Owner’s Manual
Table of contents
Introduction......................................................... 2
Recorder mode.................................................. 20
Main features........................................................................................ 2
About the Owner’s Manual.............................................................. 2
Top panel............................................................................................... 3
Rear panel.............................................................................................. 6
Metronome function.......................................................................20
Count start function.........................................................................20
Mark function.....................................................................................20
Loop recording/playback function.............................................21
Exporting song data.........................................................................21
Importing an audio file...................................................................21
Setup.................................................................... 7
Player mode....................................................... 22
Connections.......................................................................................... 7
About SD cards.................................................................................... 7
Turning the power on/off................................................................. 8
Playlist function.................................................................................22
Loop/auto-consecutive playback function.............................22
Adjusting the playback speed......................................................22
Quick Start........................................................... 9
System mode..................................................... 23
Listening to the demo performances.......................................... 9
Connecting and playing instruments........................................10
Playing and recording rhythm styles (Rhythm mode).........11
Using the recorder function (Recorder mode).......................13
Playing audio files and recording your performance (Player
mode)....................................................................................................16
Making system settings..................................................................23
Setting items.......................................................................................23
Formatting an SD card [M8] “Init”................................................23
SD card test function “tESt”............................................................23
Parts and their functions.................................... 3
Rhythm mode.................................................... 18
Registering a rhythm variation and tempo to the [M1]–[M8]
buttons.................................................................................................18
Chain function....................................................................................18
Metronome function.......................................................................19
Count start function.........................................................................19
Tonal character when the tempo/playback speed is
adjusted................................................................................................19
Appendix............................................................ 24
Voice name list...................................................................................24
Data structure on the KR-55 Pro..................................................24
Using a foot switch...........................................................................25
Troubleshooting................................................................................25
Error messages...................................................................................26
Specifications.....................................................................................27
KR-55 Pro Signal Path........................................ 28
E1
KR-55 Pro Owner's Manual
Introduction
Thank you for purchasing the KORG RHYTHM KR-55 Pro.
To help you get the most out of your new instrument, please
read this manual carefully.
Main features
Rhythm Player function
• You can enjoy jamming along with realistic live-recorded
drum and percussion accompaniment.
• Twenty-four different rhythm styles are built in. You can
directly select these rhythm styles by using the buttons on
the top panel.
• Each rhythm style has two variations, and each of these
variations contains three rhythm patterns: basic, fill-in 1,
and fill-in 2. You can switch variations or rhythm patterns
in real time as needed during your performance.
• You can use the chain function to create the rhythm
structure of an entire song so that it will play automatically.
Acoustage (surround) function
• Acoustage technology provides an expansive, extra-wide
sound field.
*Acoustage (Virtual Surround Technology by KORG)
is Korg’s original and revolutionary virtual sound
technology for creating a unique personal acoustic space.
This technology offers an unprecedented and unique
three-dimensional acoustic experience, when connecting
stereo speakers to the OUTPUT L/MONO and R jacks.
The playback system itself is acoustically analyzed, and
optimizations are applied for that specific system so that its
full potential can be realized.
Full-fledged mixer functionality
• A mic input, two guitar inputs, and an AUX input allow
multi-channel mixing.
• You can apply a reverb effect to the inputs from the MIC IN
jack, INPUT 1 jack, and INPUT 2 jack.
• You can use an equalizer to adjust the tonal character.
Tuner function
Recording function *1
• You can create complete songs by recording chained
rhythm styles along with your own performance.
• You can record along with the playback of an audio file
from an SD card.
• The completed song data can be exported (written) as a
standard audio file, and played back by a commercially
available audio player or loaded into your computer DAW.
Player function *1
• Standard audio files (WAV) can be played back from an SD
card.
• You can use the playlist function to play back your audio
files in a specific order. A playlist you create can be used for
background music or live performances.
• You can change the playback speed of audio files.
Foot switch control
• By using a VOX VFS5 foot switch, you can perform
operational tasks without having to take your hands off of
your instrument. This includes operations such as rhythm
playback or beginning recording/playback while you play
your instrument.
*1: You’ll need to insert an SD card into the KR-55 Pro.
About the Owner’s Manual
The KR-55 Pro Owner’s Manual is organized as follows:
• KR-55 Pro Quick Start Guide (printed material)
• KR-55 Pro Owner’s Manual (PDF: this booklet)
Download the PDF from the following website.
http://www.korg.com
Tip: We recommend that you read this manual while
referring to the STAGEMAN 80 video manual. You can view
this manual on the Korg website.
http://www.korg.com
Regarding data
Unexpected malfunctions caused by inappropriate operation can
cause the contents of memory to be lost. Please save important
data to other media for safekeeping. KORG INC. accepts no
responsibility for any damages resulting from loss of data.
• You can tune while viewing a large and easily visible meter.
• You can tune while listening to the pitch of an audible
guide tone.
COPYRIGHT WARNING
This professional device is intended only for use with works
for which you yourself own the copyright, for which you have
received permission from the copyright holder to publicly
perform, record, broadcast, sell, and duplicate, or in connection
with activities which constitute “fair use” under copyright law.
If you are not the copyright holder, have not received permission
from the copyright holder, or have not engaged in fair use of the
works, you may be violating copyright law, and may be liable for
damages and penalties. If you are unsure about your rights to a
work, please consult a copyright attorney.
KORG TAKES NO RESPONSIBILITY FOR ANY INFRINGEMENT
COMMITTED THROUGH USE OF KORG PRODUCTS.
*All product names and company names are the trademarks
or registered trademarks of their respective owners.
2
Parts and their functions
Parts and their functions
Top panel
1. Mixer section
2. Select section
3. Control section
3-b: Function buttons
3-a: Mode buttons
1. Mixer section
MIC IN jack (XLR jack)
Connect a dynamic mic here.
1: GND
3: COLD
2: HOT
Condenser mics are incompatible with the KR-55 Pro.
INPUT 1 jack, INPUT 2 jack
Connect a guitar, bass, or other instrument to these jacks.
TUNER button
Turns the tuner function on.
ACOUSTAGE button
Switches the Acoustage (wide) function on/off.
The Acoustage function cannot be used while recording.
Turn the Acoustage (wide) function off when using
headphones. The Acoustage function is optimal when
connecting stereo speakers to the OUTPUT L/MONO and
R jacks.
Power button
Turns the power on.
See page 8 “Turning the power on/off”
3-c: Control buttons, VALUE dial,
Display
Note: The power button blinks rapidly if the batteries become
low while the KR-55 Pro is running on batteries.
The KR-55 Pro has an auto power-off function. The auto
power-off function automatically turns off the power when
there has been no user input for a certain length of time (which
you can specify). If the auto power-off function has turned the
power off, simply turn it back on again.
Tip: You can specify the time after which the auto power-off
turns the power off (see page 23 “[M3] Auto power-off
function “APOF””).
MIC knob, peak LED
This knob adjusts the input level from the mic that’s connected
to the MIC IN jack. To avoid signal clipping (signal that’s
too loud) this knob should be adjusted so that the peak LED
doesn’t light up when signal is being input at a high volume
level.
(INPUT) 1 knob, (INPUT) 2 knob, peak
LED
These knobs adjust the input level from the instruments that
are connected to INPUTS 1&2. To avoid signal clipping (signal
that’s too loud) each knob should be adjusted so that the peak
LED doesn’t light up when signal is being loudly input.
The peak LED is shared by INPUT 1 and INPUT 2. If you’re
using both input jacks, adjust the knobs for both INPUT 1 &
INPUT 2.
3
KR-55 Pro Owner's Manual
RHYTHM/PLAY knob
• Rhythm mode: This knob adjusts the volume of the rhythm
style or metronome.
3. Control section
3-a: Mode buttons
• Recorder mode, Player mode: This knob adjusts the
playback volume of the recorder or player.
Note: Turning the knob all the way to the right produces
unity gain.
REVERB knob
This knob adjusts the send level to the reverb effect.
You can apply reverb to the signals from the MIC IN jack,
INPUT 1 jack, and INPUT 2 jack.
By default, reverb is applied to the following inputs: MIC
IN jack, INPUT 1 jack, and INPUT 2 jack. If you want, you
can apply the reverb only to the MIC IN jack, or only to
the INPUT 1 and INPUT 2 jack (see page 23 “[M2] Effect
operation “EFF””).
BASS knob
This knob adjusts the tone of the low-frequency range.
TREBLE knob
This knob adjusts the tone of the high-frequency range.
VOLUME knob
This knob adjusts the overall volume.
2. Select section
The functions of these buttons will change depending on the
mode that’s selected.
–
buttons
button
Selects Rhythm mode. In Rhythm mode you can play back
24 different rhythm styles. You can also record your own
performance along with the chained rhythm styles.
See page 11 “Playing and recording rhythm styles (Rhythm
mode)”
See page 18 “Rhythm mode”
button
Selects Recorder mode. In Recorder mode you can make a
new recording, overdub onto an existing recording, or use
loop recording.
See page 20 “Recorder mode”
button
Selects Player mode. In Player mode, you can play audio files
from the SD card. You can also record your own performance
along with the audio file playback.
See page 16 "Playing audio files and recording your
performance (Player mode)"
See page 22 “Player mode”
button
Selects System mode. In System mode you can check the
status of the system and adjust settings for the overall system.
See page 23 “System mode”
• Rhythm mode: select the rhythm style or metronome
sound. If the chain function is on, these buttons indicate the
rhythm style that is played.
Tip: If you press the [SYSTEM] button and the [Count Start]
button simultaneously, you enter Demo mode (see page 9
“Listening to the demo performances”).
• Recorder mode: select the metronome sound that is heard
when the metronome is on.
3-b: Function buttons
• Player mode: select the audio file to play back.
• Tuner function: indicate the pitch. See page 10 “Using
the tuner function”.
–
buttons
• Rhythm mode: These buttons blink to indicate the playback
position of the currently selected rhythm style. When
the chain function is on, you’ll use these buttons to check
the location where the rhythm style is registered. You
can also use these to register a favorite rhythm variation
and performance tempo, and recall it instantly (memory
function).
• Recorder mode: Registers the position of the song data (see
page 20 “Mark function”).
• Player mode: Use these buttons to select a folder inside the
inserted SD card.
(see page 24 “Folder and file structure”).
• System mode: Select system setting items
• Tuner function: Sound a guide tone (see page 10 “Using
the tuner function”)
4
button
• Rhythm mode: Turns the chain function on/off (see page
18 “Chain function”).
• Player mode: Turns the playlist function on/off (see page
22 “Playlist function”).
button
• Recorder mode, Player mode: Turns the metronome
function start/stop.
To change the time signature of the metronome, hold down
the [Metronome] button and turn the VALUE dial.
See page 19 “Metronome function”
Parts and their functions
button,
button
• Recorder mode: Switches the loop function on/off. When
the loop function is on, the region specified by the Mark
function can be played as a loop, or recorded. (see page
20 “Mark function”, page 21 “Loop recording/playback
function” ).
• Player mode: Turns the loop/auto-consecutive playback
function on/off. If the loop/auto-consecutive playback
function is on, you can play one file or all files as a loop
or consecutively. (see page 22 “Loop/auto-consecutive
playback function”).
Tip: You can choose from several types of functions when
the loop/auto-consecutive playback function is on.
button
• Rhythm mode: Use these buttons to edit the chain, or to
register/deregister memories.
• Recorder mode: Use these buttons to OK/cancel operations
such as registering a mark, deleting song data, or exporting.
• Player mode: Use these buttons to OK/cancel operations
such as editing a playlist or importing an audio file.
Note: If an error message is displayed, the [Set/OK] button
blinks. Press the [Set/OK] button to clear the error and return
to the previous display.
• 3-c: Control buttons, VALUE dial, Display
button
• Rhythm mode, Recorder mode: Turns the count start
function on/off. If this is on, playback or recording will
start after a two-measure count. Use the VALUE dial to
specify the tempo of the count (see page 19 “Count start
function”).
Note: If you’re overdubbing, you need to select the tempo that
matches your song.
Tip: In Rhythm mode, use the RHYTHM/PLAY knob to adjust
the volume of the count. In Recorder mode the volume is
fixed, and cannot be controlled by the RHYTHM/PLAY knob.
Tip: If you want the count to be other than a 4/4 time
signature, change the time signature (see page 19 “Count
start function”).
button
When you insert an SD card, the button is lit. When you
press the button, the display shows the remaining available
recording time. In System mode, this button accesses the SD
Card Test function. (see page 23 “SD card test function
“tESt””)
button
• Recorder mode: After recording in Recorder mode, this
button reverts to the state prior to recording (button lit
up). Press the button once again to return to the state after
recording (button unlit).
button
• Rhythm mode: If the Chain function is on, this button
deletes all rhythm styles that are assigned to the currently
selected chain.
• Recorder mode: Deletes the currently selected song
• Player mode: Deletes the currently selected audio file
Press the [Delete] button until it lights, and then press the
[Set/OK] button to execute the deletion.
button
• Recorder mode: From the currently selected song data,
exports (writes) an audio file that can be played in Player
mode.
• Player mode: Imports (loads) the currently selected audio
file into Recorder mode.
button
Enters the record-standby state. From the record-standby
state, press the [
] button to start recording. You can
record the external audio input from a mic or guitar, and the
rhythm style played in Rhythm mode.
• Rhythm mode: Your performance is recorded along with
the rhythm style playback.
• Recorder mode: Your performance is recorded. Your
performance is also overdubbed onto the recorded song data.
• Player mode: Your performance is recorded along with the
playback of the audio file.
In the record-standby state or during recording, the three LEDs
in the left of the display operate as the recording level meter.
,
buttons
• Rhythm mode: If the Chain function is on, these buttons
move the position where you will edit the rhythm style.
• Recorder mode: These buttons move the recording/
playback position within the song.
• Player mode: These buttons move the playback position
within the audio file.
button
Starts/pauses playback or recording.
• Rhythm mode: Starts/stops the rhythm style playback.
• Recorder mode: Starts/pauses song data playback.
• Player mode: Starts/pauses audio file playback.
Note: If the LED above the [
] button is blinking, this
indicates that the data is being prepared. Please wait.
,
(
) buttons
• Rhythm mode: Specify a fill-in for the currently selected
rhythm style.
In the record-standby state, these buttons select the
recording-destination song number.
• Recorder mode: Select song data.
• Player mode: Select an audio file. If the playlist function
is on, you can hold down the [VAR] button and use these
5
KR-55 Pro Owner's Manual
buttons to switch between playlist banks.
In the record-standby state, these buttons select the
recording-destination song number.
() button
• Rhythm mode: Switch variations for the currently selected
rhythm style. If the Chain function is on, this button returns
to the beginning of the chain.
• Recorder mode: Stops song data recording or playback,
and returns to the beginning of the song.
• Player mode: Stops audio file playback, and returns to the
beginning of the song.
button
This button specifies the ending of the rhythm style or the
tempo. To set the tempo, press this button several times. You
can also press this button to hear the sound that’s assigned to
the metronome.
Tempo LED
This is lit up if the display shows the tempo of a rhythm style
or the metronome.
REC Level LED
In the record-standby state or during recording (when
the [  ] button is blinking or lit), the three LEDs at the
left including the Song LED and Pos. LED operate as the
recording level meter. The top LED (Song LED) indicates the
peak, and will light when the input is excessive.
Adjust the recording level so that the top peak LED
flickers occasionally.
Note: If the display is showing something other than the
content described above, these LEDs will be unlit.
Rear panel
• Rhythm mode: When the rhythm is playing, this button
switches to the ending pattern of the rhythm style. When
the rhythm is stopped or when the metronome is on, this
button specifies the tempo.
• Recorder mode: Sets the tempo of the metronome when the
metronome is on.
• Player mode: Returns the playback speed to the original
setting.
1 2 3 4
• System mode: Displays the names of the system items.
5
7
6
• Tuner function: Changes the tuner’s guide tone.
VALUE dial
1. DC 9V jack
• Rhythm mode: Adjusts the tempo of the rhythm style or
metronome (48–240).
Connect the included AC adapter (DC 9V) here.
• Recorder mode: Changes the tempo of the metronome
when the metronome is on (48–240).
• Player mode: Changes the speed of audio file playback
(-25%–+25%).
The VALUE dial is also used when changing various other
settings.
Display
The display shows various types of information such as the
tempo of the rhythm style or metronome, the playback speed
of an audio file, the song data number or audio file number,
the playback position, the values of various settings, the note
name for the tuner function, and error messages.
Song LED
This is lit up if the display shows a song data number or an
audio file number.
2.
jack (stereo mini jack)
Connect your headphones here.
You must connect a stereo plug to this jack. No sound will
be output if you connect a mono plug.
3. FOOT SW jack
Connect a VOX VFS5 foot switch (commercially available)
here.
You can use the foot switch to play rhythm styles and
perform other operations without having to put down your
instrument (see page 25 “Using a foot switch”).
4. AUX IN jack (stereo mini-jack)
Connect an electronic instrument or other audio source here.
You can perform along with rhythm styles played back by
the KR-55 Pro or with music from your audio player. Use the
controls of the connected device to adjust the volume level.
5. OUTPUT L/MONO, R jack (mono phone jack)
Connect this to an external device such as a powered monitor
speaker.
Pos. LED
6. SD card slot
This is lit up if the display shows the current position in the
chain function of Rhythm mode or the playback position of
song data or an audio file.
Insert an SD card here (see page 7 “About SD cards”).
7. Battery cover
Edit LED
Install six AA batteries. You can use either alkaline batteries or
nickel-metal hydride batteries.
This is lit up if you are editing or viewing various settings.
6
Setup
Setup
Connections
The following illustration shows a typical connection example
for the KR-55 Pro. Connect your equipment as appropriate for
your needs.
Before connecting anything, turn off the power or
minimize the volume to all devices. Careless operation
could damage your speaker system or cause unexpected
malfunctions.
If you connect a mic or an acoustic guitar, acoustic
feedback could occur depending on the position of the
mic or acoustic guitar or the volume of the KR-55 Pro. If
this occurs, take the following steps.
• Move the external speaker away from the mic or
acoustic guitar.
• Change the direction of the mic or acoustic guitar.
• Adjust the volume of the KR-55 Pro.
About SD cards
SD cards that can be used with the KR-55 Pro
The KR-55 Pro can use the following types of SD cards: SDHC
(UHS-I) 4 GB–32 GB recommendation.
Inserting or removing an SD card
1. Make sure that the power is off.
2. Insert the SD card into the SD card slot located on the
rear panel of the KR-55 Pro until you hear the card click
into place.
3. To remove the SD card, push it inward until you hear it
click; then release your finger.
4. The SD card pops out slightly, allowing you to remove it.
Note: For details on how to properly handle SD cards, refer to
the manual included with your SD card.
Be sure to insert SD cards all the way, taking care that the
card is oriented correctly. Do not force a card into the slot.
Do not insert or remove an SD card while the power of the
KR-55 Pro is on. If you do so, the internal data or the data
on the SD card could be lost, possibly rendering the SD
card unusable.
Formatting (initializing) an SD card
An SD card that has been used with a computer, mobile
phone, or digital camera cannot be used with the KR-55 Pro
in that state. Before such an SD card can be used, it must be
formatted by the KR-55 Pro.
You should also format the card in the following cases.
• If the display shows the error message (“Err-Crd-***”) at
start-up .
• If the display shows the error message when playing or
recording a song.
Note: Make sure that the SD card is inserted.
1. Press the [SYSTEM] button to enter System mode (the
button lights).
2. Press the [M8] button (the button blinks).
The display indicates “Init” (Initialize), and the [Set/OK]
button blinks.
3. To format the card, hold down the [Set/OK] button for
approximately one second.
During formatting, the display's “Init” indication and the
[SD Card] button will blink.
When formatting has ended successfully, the display
indicates “End”.
If an error occurs, the display indicates “Err.” If you want
to try formatting the card again, repeat the procedure
from step 2.
When you format an SD card, all data on the card is lost. If
the card contains data that you want to keep, back it up on
your computer before you format the card.
Testing whether recording can be done on an SD card
There are some SD cards onto which the KR-55 Pro cannot
record. You can test whether a certain card can be used for
recording. Refer to “SD card test function “tESt”” on page 23.
About recording time
1 Gbyte of memory allows approximately 100 minutes
of recording; i.e., each minute of recording occupies
approximately 10 Mbytes.
Note: These recording times are approximate. As the number
of songs on the card increases, the maximum recording time
decreases slightly.
Note: The recording times listed above are for the first
recording of a new song. If you overdub, the used capacity is
the total time that was actually recorded.
Viewing the time available for recording
Tip: Here’s how to view the time that is available for
recording on the current SD card.
1. Press the [SD Card] button. Here you can check the free
capacity of the SD card.
The display indicates “Sd:Fr** (free capacity).”
If the free capacity is more than one hour, the display
indicates 1h, 2h, ... etc.
If the free capacity is less than one hour, the display
indicates 59...00.
Note: In System mode, the display indicates “tESt” and
the SD card test function is selected.
About the write protect setting of an SD card
SD cards have a write protect switch that prevents the data
from being overwritten accidentally and lost. If a card is
protected, you can’t save or delete data on it, use it to record
with the audio recorder, or format the card.
If you need to perform these procedures, you must first set
the switch to its original position.
Formatting an SD card
Before you can format the card, you must stop recording or
playback.
7
KR-55 Pro Owner's Manual
Using batteries
Turning the power on/off
The KR-55 Pro can use either an AC adapter or batteries.
Using the AC adapter
Batteries are not included. You must purchase them
separately.
1. Remove the battery cover from the rear panel.
Use only the included AC adapter. You risk causing a
malfunction if you use any other AC adapter.
1. Make sure that the power of the KR-55 Pro is off.
Check that nothing is shown in the display, and that the
buttons are unlit.
2. Install six AA batteries, either alkaline or nickel-metal
hydride, taking care that each battery is oriented in the
correct polarity as shown in the illustration.
2. Connect the DC plug of the AC adapter to the DC 9V
jack located on the rear panel.
Pay attention to the orientation of the jack when making
this connection.
3. Connect the plug of the AC adapter to an AC outlet.
Be sure to use an AC outlet of the correct voltage for the
adapter.
3. In System mode, specify the type of batteries that you’re
using.
See page 23 “[M1] Battery type “batt””
If you switch to using a different type of battery, be sure
to specify the correct battery type in System mode.
Mic
Guitar, bass, etc.
Electronic musical
instrument, etc.
DC plug
INPUT 1/INPUT 2
to
an AC outlet
MIC IN
SD card
AC adapter
VOX VFS5
8
Headphones
Powerd monitor speaker
Quick Start
Replacing the batteries
Quick Start
Replace the batteries when the power button blinks.
As the batteries run low, you might hear noise or
interruptions in the sound.
Unusable batteries should be removed immediately. If
unusable batteries are left installed in the unit, they may
leak, causing malfunctions. You should also remove the
batteries if you don’t plan to use the unit for an extended
time.
Be sure to replace all six batteries together as a set. Do not
mix fresh batteries with used batteries in the same set.
Turning the power on
This quick start section explains the basic functionality of the
KR-55 Pro. Start by reading this chapter to understand the
basic functions; then read the subsequent chapters to delve in
deeper.
Listening to the demo
performances
The KR-55 Pro contains demo song data. Let’s start by
listening to the sound of the KR-55 Pro.
Note: If a device is connected to the AUX IN jack, turn its
power on before you continue.
Note: If you’re using an SD card, insert it into the SD card
slot before you turn on the power (see page 7 “About SD
cards”).
2
1. On the top panel, set the VOLUME knob to the
minimum level (far left).
2. On the top panel, hold down the power button for at
least one second to make the button light.
When the KR-55 Pro finishes starting up, it is ready to
produce sound.
3. Turn on the power of the external equipment that is
connected to the KR-55 Pro’s OUTPUT L/MONO and R
jacks, such as powered monitor speakers.
4. Adjust the volume on the external output device and on
the KR-55 Pro.
Turning the power off
Never turn off the power or disconnect the AC adapter
during recording, while data is being converted, or while
data is being written to the system.
Doing so may make the KR-55 Pro malfunction, or
damage the data on the SD card. If the data on the SD card
has been damaged, format the card.
1. If recording or playback is occurring, press the
[
] button to stop.
4
3
1
1
1. Simultaneously press the [SYSTEM] button and [Count
Start] button to enter Demo mode.
The [SYSTEM] button and [Count Start] button blink, and
the demo song plays.
The top panel buttons light in synchronization with the
demo song.
2. Use the VOLUME knob to adjust the volume of the
demo song.
3. You can press the [
] or [
previous or next demo song.
] buttons to play the
4. To exit Demo mode, press any one of the mode buttons
[RHYTHM], [RECORDER], [PLAYER], or [SYSTEM].
2. Hold down the power button for one second or longer
until the button blinks.
After a time, the power button and display indication will
go dark, and the KR-55 Pro will shut down.
Use caution when turning off the power!
To turn off the power of the KR-55 Pro, you must press the
power button located on the panel. (When you do this, the
KR-55 Pro saves its data.)
Never disconnect the AC adapter or remove the batteries
while the power is on.
9
KR-55 Pro Owner's Manual
Connecting and playing
instruments
Using the tuner function
The KR-55 Pro has a built-in auto tuner.
The KR-55 Pro provides a mic input, two inputs for guitar or
bass, and an AUX input, allowing multi-channel mixing. A
variety of input sources are supported, including guitar, bass
guitar, and a microphone.
Here’s how to use it to tune your guitar.
1,5
Playing guitar
Here’s how to connect a guitar.
1
6
1,2
5
4
1,3
2
1. Press the [TUNER] button to turn on the tuner (the
button lights up).
2. To change the calibration, turn the VALUE dial.
You can set the calibration in a range of 435–445 Hz.
By default, the calibration is set to 440 Hz.
1. Set the (INPUT) 1 knob and the VOLUME knob to
the minimum position, and connect your guitar to the
INPUT 1 jack.
2. Use the (INPUT) 1 knob to adjust the input level.
To avoid signal clipping (signal that’s too loud) this knob
should be adjusted so that the peak LED doesn’t light up
when signal is being loudly input.
3. Use the VOLUME knob to adjust the volume that is
being outputted from the OUTPUT L/MONO and R
jacks.
3. Play any open string on your guitar.
The note name of the string that you play will appear on
the display.
Tune the string roughly until the desired note name
appears on the display.
1st string/6th string: “E”; 2nd string: “b”; 3rd string: “G”;
4th string: “d”; 5th string: “A”
4. Tune the string accurately while you watch the [(1) 8
BEAT1] – [(24) SAMBA] buttons.
The buttons act as a meter. Tune so that only the two
vertical columns in the center are lit up.
4. Use the TREBLE knob and BASS knob to adjust the
tone.
5. As necessary, use the REVERB knob to adjust the effect.
You can apply a reverb effect to the signals from the MIC
IN jack, INPUT 1 jack, and INPUT 2 jack.
Tip: If you’re using a VOX VFS5 foot switch, you can use
it to turn reverb on/off.
6. If you enable the Acoustage function by pressing the
[ACOUSTAGE] button, the audio output from the
KR-55 Pro will be heard in an expansive stereo field.
When the Acoustage function is enabled the wide stereo
effect will be applied to all audio signals output from the
KR-55 Pro.
Turn this off when using headphones. The Acoustage
function is optimal when connecting stereo speakers to
the OUTPUT L/MONO and R jacks.
5. When you’ve finished tuning, press the [TUNER} button
to turn the tuner function off.
Tip: When the tuner is on, you can use the [M1]–[M8]
buttons of the select section to play an audible guide tone.
Choose one of three sounds as the guide tone: guitar, bass,
or piano. The sound is switched each time you press the
[TAP/END] button.
Display
Guit
(guitar)
M1–M6
bass (bass) M1–M4
Pian
(piano)
10
Button
M1–M8, [(17) 16 BEAT], [(18) 16
BEAT SHUFFLE], [(20)JAZZ]–
[(22)BOSSA]
Guide tone
Strings 1–6 (1E, 2B,
3G, 4D, 5A, 6E)
Strings 1–4 (1G,
2D, 3A, 4E)
C, D, E, F, G, A,
B, C, C#, D#, F#,
G#, A#
Quick Start
Using a mic
Let’s try connecting a mic to the MIC IN jack. Only dynamic
mics can be used with the KR-55 Pro.
Condenser mics are not supported on the KR-55 Pro.
1
6
1,2
5
Playing and recording rhythm
styles (Rhythm mode)
The KR-55 Pro has twenty-four built-in rhythm styles. You
can sing or perform on an instrument while a rhythm style is
being played. Your performance can also be recorded on the
recorder along with the rhythm style.
Let’s try out rhythm styles of various genres.
4
1,3
Selecting and playing a rhythm style
2,5
2
3,7
1. Set the MIC knob and VOLUME knob to the minimum
position, and connect your mic to the MIC IN jack.
2. While vocalizing into the mic, use the MIC knob to
adjust the mic’s input level.
To avoid signal clipping (signal that’s too loud) this knob should
be adjusted so that the peak LED doesn’t light up when signal is
being input at a high volume level.
3. Use the VOLUME knob to adjust the volume that is
being outputted from the powered monitor speakers
connected to the OUTPUT L/MONO and R jacks.
4. Use the TREBLE knob and BASS knob to adjust the
tone.
5. As necessary, use the REVERB knob to adjust the effect
as desired.
Tip: If you’re using a VOX VFS5 foot switch, you can use
it to turn reverb on/off.
6. If you enable the Acoustage function by pressing the
[ACOUSTAGE] button, the audio output from the
KR-55 Pro will be heard in an expansive stereo field.
1
4,8
6
1. Press the [RHYTHM] button to enter Rhythm mode (the
button lights up).
2. Set the VOLUME knob to a fairly low level, and set the
RHYTHM/PLAY knob to about the 3 o’clock position.
3. Use the [(1) 8 BEAT1]–[(24) SAMBA] buttons to select a
rhythm style.
The button of the selected rhythm style will light up.
4. Press the [
] button to play the rhythm style.
During playback, the LED above the [
] button is lit
up. The [M1]–[M8] buttons blink to indicate the currentlyplaying measure of the rhythm style.
5. Use the VOLUME knob to adjust the volume.
6. Use the VALUE dial to set the tempo.
You can set the tempo in a range of q =48–240.
The display indicates the tempo value.
Tip: When rhythm playback is stopped, you can also set
the tempo by pressing the [TAP/END] button several
times.
7. If you press the button of a different rhythm style,
playback switches to the newly selected rhythm style at
the top of the next measure.
Note: Press the button slightly ahead of time so that the
rhythm style will be ready to switch.
8. Press the [
] button to stop playback.
Tip: You can use the chain function to create the rhythm
framework for an entire song and play it consecutively
(see page 18 "Chain function").
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KR-55 Pro Owner's Manual
Switching variations, and inserting a fillin or ending
Recording your own performance
together with the rhythm style
Each rhythm style provides two variations. Each variation has
three rhythm patterns: basic, fill-in 1, and fill-in 2.
In Rhythm mode you can record your own performance
along with the rhythm style.
Create a rhythm style chain ahead of time for the song that
you want to perform (see page 18 “Creating a chain”).
Our example here explains how to record using a chain that
you’ve already registered.
1
1
1,4
1
3
2
4
2
3
1. Select a rhythm style and play it.
See page 11 “Selecting and playing a rhythm style”
2. Press the [VAR] button to switch variations of the
rhythm style.
You’ll switch to variation B when the next measure begins.
The LED above the [VAR] button lights up to indicate that
variation B is selected.
Press the button once again to return to variation A (the
LED goes dark).
3. During playback, press the [F1] or [F2] button.
A fill-in plays when the measure changes (the LED lights),
and then the basic rhythm pattern returns.
Tip: From the stopped condition, you can press the [F1] or
[F2] button to start playback with a fill.
4. During playback, press the [TAP/END] button.
At the next measure, an ending is played and then the
rhythm style stops.
Tip: By using a VOX VFS5 foot switch, you can control the
rhythm style playback while you play your instrument.
2
5,7
4
3
4
4
3
Getting ready to record
The recorded data is saved on an SD card inserted in the
SD card slot. In order to record, insert the SD card into the
SD card slot before you turn on the power (see page 7
“Inserting or removing an SD card”).
1. Connect your mic or instrument.
See page 10 “Connecting and playing instruments”
Note: The Acoustage function cannot be used while
recording.
2. Select a chain.
Press the [Chain/Playlist] button to turn the chain function
on (the button lights). Use the [F1] or [F2] button to select
the chain that you want to play back.
In this example, press the [F1] button to select the C01
chain. Specify the tempo as desired.
3. Put the KR-55 Pro in the record-standby state, and select
the recording-destination song number.
Press the [  ] button to enter the record-standby state
(the button blinks).
The display indicates the song number (d01, d02...). The
number of an unrecorded song blinks, and the number of
an already-recorded song is lit.
Use the [F1] or [F2] button to select the song number that
you want to record.
Tip: If there is an unrecorded song (new song), the
lowest-numbered new song is selected automatically.
If you select a previously-recorded song number
(whose song number is lit) and then start recording, the
previously recorded data is lost and overwritten by the
newly recorded data.
12
Quick Start
4. Adjust the recording level of the rhythm style and the
mic or instrument.
Set the volume of the rhythm style by turning the
RHYTHM/PLAY knob to the 3 o’clock position. Use the
MIC knob and the (INPUT) 1 and 2 knobs to adjust the
volume level of your mic or instrument accordingly.
Note: In the record-standby state or during recording
(when the [  ] button is blinking or lit), the three LEDs at
the left of the display operate as the recording level meter.
Adjust the knobs listed above so that the top LED flickers
occasionally.
To check the recording level of the rhythm style, press the
[
] button and make adjustments while you record.
When you’ve finished making adjustments, press the
[
] button to stop the rhythm style.
Note: The VOLUME knob does not affect the recording
level. If acoustic feedback occurs, use this knob to lower
the overall volume.
Start recording
1. Take the steps described in “Getting ready to record” on
page 12.
2. Press the [Count Start] button to turn on the count start
function (the button blinks).
Tip: The count start function inserts a two-measure count
after you press the [  ] button before recording starts.
3. Press the [  ] button to enter the record-standby state.
The LEDs above the [  ] button and [
] button blink.
4. Use the [F1] or [F2] button to select the song number that
you want to record.
Note: Select the song number that you selected in step 3 of
“Getting ready to record” on page 12.
5. Press the [
] button.
A two-measure count is sounded, and then recording
starts.
When recording starts, the LEDs above the [  ] button
and [
] button will light up (the [Count Start] button
goes dark).
6. Perform along with the rhythm style.
Tip: If you like, you can initially record just the rhythm
style for which you specified a chain, and overdub
your performance afterward. (See page 3 “1. Mixer
section”).
Using the recorder function
(Recorder mode)
The KR-55 Pro has a built-in recorder that can record a variety
of input sources. You can use this in a variety of ways, such
as for reviewing your own personal practice sessions, or for
keeping a record of your musical ideas.
Here we explain recording in Recorder mode. The content
that you can record differs as follows depending on the mode.
• Rhythm mode: Your performance is recorded along with
the rhythm style playback.
• Recorder mode: Your performance is recorded. Your
performance can also be overdubbed onto the recorded
song data.
• Player mode: Your performance is recorded along with the
playback of the audio file.
Note: The BASS, TREBLE, and ACOUSTAGE effects cannot
be recorded. The REVERB effect applied to the input audio
from the MIC IN, INPUT 1, and 2 jacks can be recorded.
The recorded data is saved on an SD card inserted in the
SD card slot. In order to record, insert the SD card into the
SD card slot before you turn on the power (See page 7
“Inserting or removing an SD card”).
Playing back the recorded performance
You’ll use Recorder mode to play back the performance that
you recorded on the KR-55 Pro.
1. Press the [RECORDER] button to enter Recorder mode
(the button lights).
2. Use the [F1] or [F2] button to select the song number that
you want to play.
3. Use the RHYTHM/PLAY knob to adjust the playback
volume of the recorded performance.
If you want the recorded sound to play back at the same
volume as when it was recorded, turn the RHYTHM/
PLAY knob all the way to the right.
4. Press the [
] button to start playback.
5. Press the [
] button to stop playback. To return to
the beginning of the song, press the [VAR] button.
7. When you’ve finished performing, press the [
]
button to stop recording.
You can listen to the recorded song in Recorder mode.
(See page 13 “Playing back the recorded performance”)
Tip: If the chain contained a stop setting, it stops
automatically.
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KR-55 Pro Owner's Manual
Recording your performance
Overdubbing onto a recorded song
Overdubbing is the process of recording additional material
onto a previously-recorded song.
2
2
2
2
1
4
6
5
6,8
2
2
3
1. Press the [RECORDER] button to enter Recorder mode
(the button lights up).
2. Connect the mic or instrument that you want to record,
and adjust the volume.
See page 10 “Connecting and playing instruments”
3. Select a new song. Press the [F2] button until a song
number blinks in the display.
Blinking numbers are new songs. Numbers that remain lit
up are previously-recorded songs.
Tip: On the KR-55 Pro, recorded data is called “song
data,” and is handled in units called “songs.”
4. If you want to hear a metronome tone as a guide while
you record, press the [Metronome] button to turn on the
metronome function.
Use the [(1) 8 BEAT1]–[(16) BLUES2] buttons to select
the sound of the metronome (see page 24 “Voice name
list”).
By default, the metronome’s time signature is set to 4/4.
If you want to change the time signature, hold down the
[Metronome] button and turn the VALUE dial.
You can select the time signature from the 9 choices in
the range 3/4, 4/4, 4/5, 7/4, 5/8, 6/8, 7/8, 9/8, and 12/8. The
display shows the time signature value.
Time signature display example: 4/4 time signature:
“04:04”
5. Press the [Count Start] button to turn on the count start
function (the button blinks).
6. To start recording, press the [  ] button and then the
[
] button.
A two-measure count is sounded, and then recording
starts (the [Count Start] button goes dark).
The song position in the display changes to a time
indication.
8. When you’ve finished performing, press the [
button to stop recording.
2,3,5
1
2
1. Use the [F1] or [F2] button to select the song that you
want to overdub.
2. Adjust the playback audio and the mic or instrument
recording level.
Set the volume of the playback audio by turning the
RHYTHM/PLAY knob to the 3 o’clock position. Use the
MIC knob and the (INPUT) 1 and 2 knobs to adjust the
volume level of your mic or instrument accordingly.
If you want the previously-recorded sound to be recorded
at the same volume as when it was recorded, turn the
RHYTHM/PLAY knob all the way to the right.
Note: In the record-standby state or during recording
(when the [  ] button is blinking or lit), the three LEDs at
the left of the display operate as the recording level meter.
Adjust the knobs listed above so that the top LED flickers
occasionally.
Note: To check the recording level of the audio playback
that is being recorded, press the [
] button and make
adjustments while you record.
When you’ve finished making adjustments, press the
[VAR] button to return to the beginning of the song.
After you’ve recorded and adjusted the level, press the
[Undo] button to return to the state prior to recording.
Note: The VOLUME knob does not affect the recording
level. If acoustic feedback occurs, use this knob to lower
the overall volume.
3. To start overdubbing, press the [  ] button and then the
[
] button.
Tip: If you press the [Count Start] button to turn on the
count start function, overdubbing starts after a twomeasure count is sounded.
4. Play your instrument.
7. Play your instrument.
14
2
]
5. When you’ve finished performing, press the [
button to stop recording.
]
Quick Start
Using punch-in to overdub onto a
recorded song
You can play back a song and then start recording by
pressing the [  ] button at the moment you want to begin
overdubbing.
4,6
3
Up to 50 songs can be recorded on one SD card. However in
some cases, the number of songs that can be recorded might
be less than 50 depending on the length of the recorded songs
and on the capacity of the SD card.
If there is insufficient free capacity on the SD card, you’ll need
to either provide another SD card or delete data from the SD
card.
2
2
1
1. Use the [F1] or [F2] button to select the song where you
want to add an overdub.
2. Use the [
] or [
] button to move to a location slightly
earlier than the point where you want to punch-in.
The display indicates the song position.
3. Press the [
Deleting a recorded song
] button to start playback.
4. Just before the point where you want to overdub, press
the [  ] button to start recording (the button lights up).
5. Play your instrument.
6. When you’ve finished performing, press the [  ] button
to stop overdubbing.
The song switches from recording to playback (the button
goes dark).
3
1
1. Use the [F1] or [F2] button to select the song that you
want to delete.
2. Hold down the [Delete] button until it lights.
The [Set/OK] and [Clear/Cancel] buttons blink.
3. Press the [Set/OK] button.
If you decide to cancel the deletion, press the [Clear/
Cancel] button.
When the [Delete] button goes dark, deletion is complete.
Tip: If you’re using a VOX VFS5 foot switch, you can use the
foot switch to control punch-recording.
Tip: You can also use the mark function to record a specific
region. (see page 20 “Mark function”).
Returning to the state prior to recording
(Undo)
You can use the [Undo] button if you’re not satisfied with the
recording you made.
Note: The Undo function is available only for recording in
Recorder mode.
1. After recording, press the [Undo] button to return to the
state prior to recording (the button will light up).
2. If you press the button once again, you’ll return to the
state after recording (button unlit).
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KR-55 Pro Owner's Manual
Playing audio files and recording
your performance (Player mode)
In Player mode, you can play WAV format (44.1 kHz/16-bit,
stereo) audio files from the SD card.
You can also record your performance on the recorder along
with the audio file that is playing back.
Playing audio files stored on an SD card
Here’s how you can copy audio files from your computer to
an SD card and play back those files on the KR-55 Pro.
2,5
6
6
Tip: This is because with the default settings, Loop/
Auto is on, and the operating mode is LP:C1. You can
change this mode (see page 22 “Loop/auto-consecutive
playback function”).
5. You can use the [F1] or [F2] buttons to select an audio file
to play.
6. Use the RHYTHM/PLAY knob to adjust the playback
volume of the audio file, and use the VOLUME knob to
adjust the overall volume.
7. During playback, you can use the VALUE dial to change
the playback speed.
You can adjust the speed in the range of ±25%.
The value will be shown for about one second, after which
the audio file number will be shown.
8. During playback, you can press the [
] button to
pause.
If you press the [VAR] button, playback stops and you
return to the beginning.
9. Press the [
] button once again to start playback
from the paused location.
3
Tip: In Player mode, you can use the playlist function to
play only the files you want in a specific order (see page 22
“Playlist function”).
1
2
4,8,9
5
7
Preparing audio files
1. Format an SD card on the KR-55 Pro.
See page 7 “Formatting (initializing) an SD card”
2. Power-off the KR-55 Pro, and remove the SD card.
3. Insert the SD card into your computer, and copy an
audio file from your computer into one of the [M1]–[M8]
locations in the PLAYER folder of the SD card.
See page 24 “Folder and file structure”
4. When you’ve finished copying the audio files, remove
the SD card from your computer and insert it into the
KR-55 Pro.
5. Power-on the KR-55 Pro.
Playing back
1. Take the steps described in “Preparing audio files” on
page 16.
2. Press the [PLAYER] button to enter Player mode.
The [SD Card] button lights.
The display shows the number of the audio files stored
on the SD card. The first item of data on the SD card is
selected. The audio files in the PLAYER folder of the SD
card are shown by the KR-55 Pro in alphabetical order of
their file name.
3. Use the [M1]–[M8] buttons to select the folder on the SD
card that contains the song you want to play.
The button corresponding to the selected folder blinks.
See page 24 "Folder and file structure"
4. Press the [
] button to play the file.
When the file has finished playing, the next file plays.
16
When all files in the SD card have played, playback stops.
Quick Start
Recording your own performance
together with the audio file playback
recording state. When you’ve finished adjusting the level,
press the [
] button to stop; then re-select the song in
the record-standby state.
Just as you can record your performance together with a
rhythm style, you can record your performance together with
an audio file that’s playing.
Note: The VOLUME knob does not affect the recording
level. If acoustic feedback occurs, use this knob to lower
the overall volume.
4. Press the [
] button to start recording.
The LEDs above the [  ] button and [
] button are
lit.
1
1,3
3
3
2
2
6. When you’ve finished performing, press the [
]
button to stop recording.
You can listen to the recorded song in Recorder mode (see
page 13 “Playing back the recorded performance”).
Tip: You can import data that can be used in Recorder mode,
and then use Recorder mode to overdub onto that data. (see
page 14 “Overdubbing onto a recorded song”)
3
3,4,6
5. Play your instrument along with the playback of the
audio file.
2,3
The recorded data is saved on an SD card inserted in the
SD card slot. In order to record, insert the SD card into the
SD card slot before you turn on the power (see page 7
“Inserting or removing an SD card”).
Note: When recording in Player mode, you can’t start
recording from a specific point of the playback, nor can you
record just a specific region. You can only record from the
beginning of the audio file. If you want to record from midway through the playback, or only in a specific region, you’ll
need to use the import function.
1. Connect the mic or instrument that you want to record,
and adjust the volume accordingly.
See page 10 “Connecting and playing instruments”
2. Use the [M1]–[M8], [(1) 8 BEAT1]–[(24) SAMBA] buttons
or the [F1] and [F2] buttons to select an audio file.
3. Put the KR-55 Pro in the record-standby state, and select
the song number that you want to record.
Press the [  ] button to put the KR-55 Pro in the recordstandby state, and then use the [F1] or [F2] button to select
the song number that you want to record.
The display indicates the song number (d01, d02...). The
number of a new song blinks, and the number of an
already-recorded song is lit.
Tip: If there is a new song, the lowest-numbered new
song is selected automatically.
If you select a previously-recorded song number
(whose song number is lit) and then start recording, the
previously recorded data is lost and overwritten by the
newly recorded data.
• Adjust the playback of the audio file and the mic or
instrument recording level.
Set the volume of the audio file by turning the RHYTHM/
PLAY knob to the 3 o’clock position. Use the MIC knob
and the (INPUT) 1 and 2 knobs to adjust the volume level
of your mic or instrument accordingly.
Note: Adjust the level so that the top LED of the three
LEDs in the left side of the display flickers occasionally.
Note: Note: To check the recording level of the audio
file, press the [
] button to put the KR-55 Pro in the
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KR-55 Pro Owner's Manual
Rhythm mode
In Rhythm mode you can play back rhythm styles and record
your performance, and also use the following functions.
• A “memory function” that lets you register your favorite
rhythm variations and performance tempo.
• A “chain function” that lets you create rhythm styles for an
entire song by specifying a rhythm style for each measure.
• A “metronome function” that lets you sound the metronome
in the time signature and tempo that you specify.
• A “count start function” that lets you insert a two-measure
count when playing back a rhythm style.
The “Rhythm mode” section further explains these functions.
For a guide to basic operation, refer to “Playing and recording
rhythm styles (Rhythm mode)” on page 11.
Registering a rhythm variation and
tempo to the [M1]–[M8] buttons
You can register a favorite rhythm variation and playback
tempo to each of the [M1]–[M8] buttons.
Registering a rhythm variation and tempo
1. Select the rhythm variation that you want to register,
and specify the tempo.
Note: You cannot register a fill-in or ending.
2. Press the [
] button to stop the rhythm style.
Chain function
The chain function lets you create the rhythm track for an
entire song by specifying a rhythm style for each measure.
Creating a chain
1. Press the [Chain/Playlist] button to turn on the chain
function (the button lights up).
2. Use the [F1] button and [F2] button to select the chain
bank.
You can create up to 30 banks of chains. When the
KR-55 Pro starts up, the first chain (C01) is selected.
3. Hold down the [Chain/Playlist] button until it blinks.
The three buttons [Chain/Playlist], [Set/OK], and [Clear/
Cancel] blink, indicating that you can now register a
rhythm style for each measure.
The LED of the [
style is playing.
] button blinks when the rhythm
The display indicates the measure number. The [M1]–[M8]
buttons blink as a guide to eight-measure units of the
specified measure location.
If you’ve selected a chain where a rhythm style is already
registered, you’ll hear the rhythm style that is registered at
the first measure or at the specified measure.
If no rhythm style has yet been registered for the chain,
you’ll hear the “8 BEAT1” rhythm style, which is registered
by default for the first measure.
4. Specify the tempo.
3. Hold down the [Set] button and press one of the [M1]–
[M8] buttons.
The rhythm style’s variation and tempo are registered.
5. Use the [(1) 8 BEAT1]–[(24) SAMBA] buttons, [VAR]
button, [F1] button, and [F2] button to specify the rhythm
style, variation, and fill-in that you want to register.
Cancelling a registered rhythm variation and tempo
1. With the rhythm style stopped, hold down the [Clear/
Cancel] button and press the button whose registration
you want to cancel.
The registered content is cancelled.
6. Press the [Set/OK] button to confirm registration of the
rhythm style.
The rhythm style is registered to that measure, and
you move to the next measure. For measures where the
registration has been completed, the corresponding button
([M1]–[M8]) changes to steadily lit up.
Using the memory buttons to recall a registration
7. To specify the measure where you want to register a
rhythm style, use the [
] or [
] button.
Tip: When the unit is shipped from the factory, a rhythm
style and tempo is already assigned to each of the [M1]–[M8]
buttons.
8. Repeat steps 5–7 to continue the registration process.
You can register rhythm styles for up to 999 measures in
one chain.
1. While the rhythm style is stopped, press one of the
[M1]–[M8] buttons to select the rhythm that’s registered
to that button.
The rhythm style switches to the variation and tempo that
are registered to that button.
[M1]–[M8] buttons to which a variation and tempo are
registered are lit when the rhythm style is stopped.
When you press a button to select a rhythm, it changes to
blinking.
9. To cancel the rhythm style of the specified measure, press
the [Clear/Cancel] button.
The [M1]–[M8] button corresponding to that measure goes
dark.
2. Press the [
] button.
The rhythm style variation registered to that button plays.
11.To register the position of the last measure, press the
[
] button to make the LED go dark, and then press
the [Set/OK] button. If you want to register an ending
pattern to end the performance, press the [TAP/END]
button to make the LED light up, and then press the
[Set/OK] button.
18
10.If you want to add one measure before the specified
measure, hold down the [Set/OK] button for
approximately one second. If you want to delete the
specified measure, hold down the [Clear/Cancel] button
for approximately one second.
Rhythm mode
12.When you are finished registering rhythm styles, press
the [Chain/Playlist] button (the button lights up).
All settings and the tempo are confirmed at this time.
13.To hear the newly created chain from the first measure,
press the [VAR] button to return to the first measure, and
then press the [
] button to play back.
Playing the chain you created
1. With the [Chain/Playlist] button lit up, press the
[
] button.
The registered rhythm styles play, starting from the first
measure. When playback reaches the last measure, it stops.
During playback, you can press the [
] button to
pause. Press the button once again to resume playback
from the paused location.
If you press the [VAR] button during playback, playback
stops and you return to the first measure.
Deleting all rhythm styles registered to the entire
chain
1. Use the [F1] and [F2] buttons to select the chain from
which you want to delete all the rhythm styles you
registered.
The number of the selected chain (C**) appears in the
display.
2. Hold down the [Delete] button until it lights.
The [Set/OK] and [Clear/Cancel] buttons blink. The chain
number shown in the display blinks.
3. Press the [Set/OK] button.
When the [Delete] button goes dark, deletion is complete.
The chain now has the default settings (the 8 BEAT1
rhythm style is registered).
About the metronome time signature
The metronome time signature is normally set to 4/4 (while
you hold down the [Metronome] button, the display shows
“04:04”). If you want to change the time signature, hold down
the [Metronome] button and turn the VALUE dial. You can
choose from the following time signatures: 3/4, 4/4, 5/4, 7/4,
5/8, 6/8, 7/8, 9/8, and 12/8.
Count start function
The count start function inserts a two-measure count before
the rhythm style plays.
The count has the same time signature as the rhythm
style.
Using the count start function
1. Press the [Count Start] button to turn on the count start
function (the button blinks).
2. Press the [
] button.
A two-measure count sounds, and then the rhythm style
starts (the [Count Start] button goes dark).
Tonal character when the tempo/
playback speed is adjusted
In the KR-55 Pro’s Rhythm mode, dedicated audio data for
the rhythm styles are played back.
Multiple audio data are provided so that each audio data will
provide a natural performance in its tempo range.
When you adjust the tempo, the audio data being played back
may be switched depending on the range of the adjustment;
this can cause the character of the sound to differ somewhat
depending on the tempo.
Metronome function
This lets you sound the metronome in the time signature and
tempo that you specify.
1. Press the [Metronome] button to turn on the metronome
(the button lights up).
2. Use the [(1) 8 BEAT1]–[(16) BLUES2] buttons to select a
sound for the metronome.
3. Use the VALUE dial to set the tempo of the metronome.
Tip: You can also use the [TAP/END] button to set the
tempo.
4. Use the RHYTHM/PLAY knob to adjust the volume of
the metronome.
Note: The sound of the metronome is not recorded even if
you record while the metronome is playing.
Note: In Rhythm mode, you can choose whether to play the
metronome or a rhythm style. If the metronome is playing,
pressing the [
] button turns the metronome off, and
switches to rhythm style playback.
In Recorder mode, only the metronome can be used. In Player
mode, neither can be used.
19
KR-55 Pro Owner's Manual
Recorder mode
The KR-55 Pro can record a variety of input sources, such as
the performance of an instrument connected to the INPUT 1
jack or INPUT 2 jack, the vocal from a mic connected to the
MIC IN jack, or an electronic instrument connected to the
AUX IN jack.
The recorded data is saved in 44.1 kHz/16-bit stereo WAV
format on an SD card inserted in the SD card slot.
You can record up to 50 songs on an SD card inserted in the
SD card slot. However in some cases, the number of songs
that can be recorded might be less than 50 depending on the
length of the recorded songs and on the capacity of the SD
card.
For additional details on basic operation, refer to “Registering
a rhythm variation and tempo to the [M1]–[M8] buttons” on
page 18.
If the display shows an error message such as Crd - bSy
(Card-Busy) or “Err-Crd-***” (Error Card ***) during
playback or recording, please format the card (see page
7 “Formatting (initializing) an SD card”).
The KR-55 Pro provides the following functions that are
useful when recording.
• A “metronome function” that lets you sound the
metronome during recording in the time signature and
tempo that you specify.
• A “count start function” that inserts a two-measure count
when you start recording.
• A “mark function” that lets you register a location within a
song, and recall that location when you record.
• A “loop-playback and region-record function” that lets
you loop-playback or record in a region between specified
marks.
These functions are explained in depth in the “Recorder
mode” section.
Metronome function
This lets you sound the metronome during recording in the
time signature and tempo that you specify. In Recorder mode
the metronome volume is fixed, and cannot be controlled by
the RHYTHM/PLAY knob.
Additionally, in Recorder mode only the metronome can be
used.
Other operation is the same as in Rhythm mode.
Tip: The sound of the metronome is not recorded when you
record while the metronome is playing.
See page 19 “Metronome function”
20
Count start function
The count start function inserts a two-measure count before
recording starts.
1. Press the [Count Start] button to turn on the count start
function (the button lights up).
2. Press the [  ] button and then press the [
] button.
A two-measure count is sounded, and then recording starts.
Tip: If you want to use the count start function when
overdubbing, you must set the tempo to match your song.
About the count time signature
The time signature of the count is shared with the metronome.
If you want to change it, hold down the [Metronome] button
and turn the VALUE dial.
Mark function
This function lets you register a mark at a desired location within
a song, and then recall that location when needed, such as when
recording. You can register marks at eight locations in a song, and
move directly to a registered mark by pressing a button.
Registering a mark
1. Use the [F1]/[F2] buttons to select a song.
2. Press the [
] button to play the song.
3. At the location at which you want to register a mark,
hold down the [Set/OK] button and press one of the
[M1]–[M8] buttons (the button lights).
4. Press the [
] button to stop the song.
5. Press the [M1]–[M8] button that you registered.
You move to the location in the song at which you
registered the mark.
Deleting a mark
1. Hold down the [Clear/Cancel] button and press the
button ([M1]–[M8]) in which you registered the mark that
you want to delete.
The mark registered to the button you pressed is deleted
(the button goes dark).
Recorder mode
Loop recording/playback function
Importing an audio file
You can loop-playback or record the region between marks
that you specify.
An audio file in the SD card can be imported (loaded) into
song data that you can use in Recorder mode. The imported
data can be played or overdubbed in Recorder mode.
Playing a loop or recording a region
Here we explain how to loop-playback and record the region
between the marks registered to the [M1] button and [M2] button.
An audio file that can be played in Player mode cannot be
directly played back in Recorder mode. The file must be
imported as Song data that can be played in Recorder mode.
1. Press the [Loop/Auto] button to turn the loop function on
(the button lights up).
Audio files of the following format can be imported.
2. Press the [M1] button to specify the loop-start location.
The button blinks, and the loop region is specified as the
region between the locations registered to the [M1] and
[M2] buttons.
• Bit depth: 16-bit
Note: Allow at least two seconds for the loop region.
The loop region is the region between the loop-start
location and the location registered to the next button to
the right. For example if you specify the [M1] button as the
loop-start location, the loop region is the [M1]–[M2] region;
if you specify the [M2] button as the loop-start location,
the loop region is [M2]–[M3]. If no mark is registered to
the next-numbered button, the loop setting is ignored. You
can’t specify the [M8] button as the loop-start location.
3. Press the [
] button.
Loop playback occurs between the locations of the [M1]
button and [M2] button.
4. Press the [  ] button.
After playback reaches the end of the loop region,
recording begins from the loop-start location.
5. Play your instrument to record it.
Recording ends when you reach the end of the loop region,
and loop playback resumes.
If you want to continue overdubbing, press the [  ] button
again and repeat the process.
6. Press the [
• File format: WAVE format uncompressed linear PCM
• Sampling frequency: 44.1 kHz, stereo files
Import procedure
1. In Player mode, use the [F1] or [F2] buttons to select the
audio file that you want to import.
2. Press the [Write] button.
3. Use the [F1] or [F2] button to select the importdestination song number.
The display indicates the song number (d01, d02...). The
number of a new song blinks, and the number of an
already-recorded song is lit.
Tip: If there is a new song, the lowest-numbered new song
is selected automatically.
If you select an already-recorded song (whose song
number is lit) and begin the import, the selected song
data is erased and overwritten by the imported data.
4. Press the [Set/OK] button to import the song.
If you decide to cancel, press the [Clear/Cancel] button.
The imported song data is placed in the song number that
you specified.
The imported data is saved in the D*** folder of the SD card.
] button to stop recording.
Exporting song data
Song data that you record can be exported (written) as an
audio file to the SD card.
The exported audio file can be played back using the
KR-55 Pro’s Player mode or a commercially available audio
player, or loaded into your computer DAW.
The exported audio file is in the following format.
• File format: WAVE format uncompressed linear PCM
• Bit depth: 16-bit
• Sampling frequency: 44.1 kHz
• File name: SONGnnnn.WAV (the four characters “nnnn”
are an automatically assigned consecutive number)
Export procedure
1. Use the [F1] or [F2] buttons to select the song that you
want to export.
2. Press the [Write] button.
3. Press the [Set/OK] button to export the song.
If you decide to cancel, press the [Clear/Cancel] button.
The exported data is saved in the M1 folder of the SD card.
When exporting is complete, the [Write] button goes dark
and the four-digit number of the exported file is displayed.
The time required for exporting depends on the amount
of free space on the SD card and on the length of the song
you’re exporting.
21
KR-55 Pro Owner's Manual
Player mode
In Player mode you can play back audio files from an SD card.
Audio files of the following formats can be played.
• WAV format (44.1 kHz / 16-bit)
While an audio file plays in Player mode, you can perform
on an instrument connected to the KR-55 Pro or record
your performance (see page 17 “Recording your own
performance together with the audio file playback”).
A song that you record in Recorder mode cannot be
played back directly in Player mode. It must be converted
into an audio file that can be played in Player mode.
Player mode has the following functions that are useful when
playing audio files.
• A “playlist function” that lets you register audio files in a
playlist and play them in the order you specified.
• A “loop/auto-consecutive playback function” that lets you
loop the playback or automatically play files in succession.
These functions are further explained in this section, “Player
mode.” For additional details on basic operation, refer to
“Playing audio files and recording your performance (Player
mode)” on page 16.
Playlist function
There are ten playlist banks; you can register up to 24 audio
files in each bank, and play those files in the order you specify.
Creating a playlist
1. Press the [Chain/Playlist] button to turn the playlist
function on (the button lights up).
2. Hold down the [VAR] button, and use the [F1] and [F2]
buttons to select the playlist that you want to create.
3. Hold down the [Chain/Playlist] button until it blinks.
The [Chain/Playlist] button and [Set/OK] blink; the
KR-55 Pro is waiting for you to register an audio file.
4. Use the [M1]–[M8] buttons to select a file bank, and use
the [F1] and [F2] buttons to select the audio file that you
want to register.
The display indicates the audio file number.
Tip: You can use the [M1]–[M8] buttons to select folders
M1–M8 on the SD card (see page 24 “Folder and file
structure”).
5. Press one of the [(1) 8 BEAT1]–[(24) SAMBA] buttons
to register the selected audio file at the corresponding
position of the playlist.
The [(1) 8 BEAT1]–[(24) SAMBA] buttons correspond to
the locations where up to 24 songs can be registered in a
playlist. You create a playlist by assigning an audio file to
each button. The file assigned to the [(1) 8 BEAT1] button is
the first song, the file assigned to the [(2) 8BEAT2] button is
the second song, etc.
The button lights when you register a file to it.
6. Repeat steps 4 and 5 to register audio files in the playlist.
Tip: To cancel a registration, press the [Clear/Cancel]
button and then press the button [(1) 8 BEAT1]–[(24)
SAMBA] for the audio file you want to unregister. The
registration is cancelled, and the button goes dark.
22
7. When you are finished registering audio files to the
playlist, press the [Chain/Playlist] button (the button
lights up).
The [Set/OK] button and [Clear/Cancel] button go dark.
Playing a playlist
1. Press the [Chain/Playlist] button to turn on the playlist
function (the button lights up).
2. Hold down the [VAR] button, and use the [F1] and [F2]
buttons to select the playlist (P01, P02...) that you want to
play.
3. Use the [(1) 8 BEAT1]–[(24) SAMBA] buttons to select the
audio file that you want to play.
4. Press the [
] button to start playback.
5. The audio files play in the order they are registered in the
playlist.
Loop/auto-consecutive playback
function
In Player mode you can make files play as a loop or
consecutively.
1. Press the [Loop/Auto] button to turn the loop/autoconsecutive function on (the button lights up).
2. Press the [
] button.
The player starts playback.
When one audio file finishes playing, the next file
automatically starts playing. The files play consecutively
until the last file has finished playing.
This is how operation occurs if the operating mode is set to
LP:C1. You can change the operating mode if you like. Make
this setting in step 3.
If this is off, when one file finishes playing or recording, the
position returns to the beginning of that file.
3. To change the operating mode, hold down the [Loop/
Auto] button and turn the VALUE dial.
LP:1L: Loop one file
LP:AL: Loop all files
LP:C1: Play consecutively (no looping, normal operation)
LP:C2: Play consecutively (no looping, pause between
files) You can also use the play button of the panel or of a
connected foot switch to play the next file at the desired
time.
Adjusting the playback speed
You can change the playback speed of an audio file in a range
of -25%–+25% without affecting the pitch.
1. Use the VALUE dial to change the playback speed of the
audio file.
2. If you press the [TAP] button, the speed returns to the
original setting.
Note: The audio quality might be degraded if you change the
playback speed of an audio file beyond a certain range.
Note: You can’t change the playback speed of song data in
Recorder mode.
System mode
System mode
In System mode you can adjust the following settings that
affect the overall operation of the KR-55 Pro.
Making system settings
1. Press the [SYSTEM] button to enter System mode (the
button lights up).
2. Use the [M1]–[M4] buttons to select a system setting item.
The button that you pressed blinks.
An abbreviated name of the selected function is shown on
the display for approximately one second, and then the
current value of the setting is shown.
3. Use the VALUE dial to change the setting.
SD card test function “tESt”
This function tests a SD card by automatically reading and
writing data to the card to determine whether the card is
compatible with the recorder. The recorder will decide that
a card is not compatible if the writing speed of the card is
slower than the speed required for recording. Executing this
test enables you to discover the recording conditions required
for the card. In this way, you can use the card more efficiently.
The results of this test do NOT absolutely guarantee the
operation of a card. Even if the recorder determines that
your card can be used for recording based on the test
results, the card may still cause an error (such as “Crd bSy (Card-Busy)”) depending on recording conditions or
the application environment.
Note: Make sure that the SD card is inserted.
4. Press a different mode button to exit System mode.
1. Press the [SYSTEM] button to enter System mode (the
button lights).
Setting items
For the procedure, refer to “Making system settings.”
2. Press the [SD Card] button (the button is lit).
The display indicates “tESt” (test), and the [Set/OK] button
and the [Clear/Cancel] button blink.
[M1] Battery type “batt”
Note: In other modes, pressing the [SD Card] button makes
the display show the time available for recording.
Specifies the type of batteries that are installed.
aL: Alkaline batteries
nH: Nickel-metal hydride batteries
If you specify a type of battery that is different than the
batteries actually installed, the remaining battery capacity
is not displayed correctly.
Note: If you are using the KR-55 Pro on batteries, and you
press the [M1] button to select this item, the [(1) 8 BEAT1]–
[(16) BLUES2] buttons light to indicate the remaining
battery capacity. The lower the batteries are, the fewer
buttons will be lit.
[M2] Effect operation “EFF”
Specifies the input jack(s) where the reverb effect is applied.
AL: MIC IN jack, INPUT 1 jack, INPUT 2 jack
M: MIC IN jack
3. To execute the card test, hold down the [Set/OK] button
for approximately one second.
During execution, the display blinks “tESt,” and the [Clear/
Cancel] button blink.
Note: Depending on the type of SD card, the test may take
some time.
If you decide to cancel the test, press the [Clear/Cancel]
button.
When the test is completed, the display shows the test
result.
Good: Recording is possible on this SD card.
bad: Recording to this SD card has some limitations.
MODE
RHYTHM
Good

bad

RECORDER


Recording is available, but
overdubbing is not.
PLAYER


Recording is not available,
only playing WAV files.
In: INPUT 1 jack, INPUT 2 jack
[M3] Auto power-off function “APOF”
Specifies the time after which auto power-off operates.
oF: Auto power-off function is off
Limitations
Can’t Record
Note: If you want to try the test again, repeat the procedure
from step 2.
10: 10 minutes
30: 30 minutes
1h: 1 hour
4h: 4 hours
Formatting an SD card [M8] “Init”
Formats an SD card. (“Formatting an SD card” on page 7)
23
KR-55 Pro Owner's Manual
2. D001 (song folder)
Appendix
This folder is created for each song when you record on the
KR-55 Pro. New songs are created consecutively, starting
with D001. The three digit number following “D” is the song
number.
Voice name list
Tip: Songs exported in Recorder mode are saved in the
[PLAYER] folder.
Metronome
[D001]–[D050]: Song data folders.
No.
Name
No.
Name
1
Metronome (Wood)
9
Closed HH 1
Each song data folder contains recording data files and
management files.
2
Metronome (Electronic)
10
Closed HH 2
Player mode
3
Analog Clave
11
Analog HH 1
4
Analog Woodblock 1
12
Analog HH 2
5
Analog Woodblock 2
13
Maracas
6
Analog Bongo
14
Tambourine
7
Cowbell
15
Bass Drum
8
Sidestick
16
Hand Clap
PLAYER
M1
1: ****.WAV
99: ****.WAV
M8
Demo songs
1: ****.WAV
99: ****.WAV
1. Demo Song 1: Introduction to rhythm and functions
2. Demo Song 2: Demo song (Pops); song title “Open Heart”
3. Demo Song 3: Demo song (Blues); song title “Day In and
Day Out”
Data structure on the KR-55 Pro
An SD card formatted and recorded on the KR-55 Pro has the
following structure.
3. PLAYER folder
This is used when playing external audio files (WAV).
[PLAYER]: Audio data folder for Player mode
4. External WAV files
These are external files for playing or overdubbing on the
KR-55 Pro.
The following formats can be played or overdubbed.
Folder and file structure
File format: WAV files
Recorder mode
File bit depth: 16-bit
RECORDER
Sampling frequency: 44.1kHz
D001
Channel: Stereo
D002
[M1]–[M8]: Data folders for audio files
****.WAV: Audio files
Up to 99 files can be used in each folder. If you have audio
files that you want to play or overdub on the KR-55 Pro, copy
them from your computer into these folders.
D050
Up to 50 songs
1. RECORDER (data folder)
The KR-55 Pro’s system data and recorded data are saved
here.
50 song folders are created in this folder.
Note: Depending on the capacity of the SD card you’re using,
it might not be possible to create 50 song files.
[RECORDER]: Song data folder for Recorder mode.
If you want to make a backup of the Recorder mode data,
or use Recorder mode data on another SD card, use your
computer to copy the [RECORDER] folder.
24
If you record a song in Recorder mode and use the export
function to convert it to an audio file, that file is added to
the M1 folder. The file name is “SONG****.WAV.” “****” is a
consecutive number that’s assigned automatically.
Appendix
Using a foot switch
Troubleshooting
If you connect a VOX VFS5 foot switch (commercially
available) to the rear panel FOOT SW jack, you can use your
foot to switch programs or perform recording operations.
1. Power won’t turn on
• Is the AC adapter’s DC plug connected to the rear panel DC
9V jack?
• Is the AC adapter’s power plug connected to an AC outlet?
• Is the AC outlet working correctly?
• If you’re using batteries, are they installed correctly?
2. No sound (or insufficient volume) is coming from the
OUTPUT L/MONO, R and jack.
Each switch has the following function.
Switch Rhythm mode
• Could the guitar’s volume be turned down?
Recorder
mode
Player mode
BANK
Play/Stop
Play/Pause
Play/Pause
CH1
Select fill-in 1
(when the Chain
function is on,
bank selection-)
Record
Select songs -
CH2
CH3
Select fill-in 2
(when the Chain
function is on,
bank selection-)
CH4
• Could the top panel VOLUME knob be set to a low setting?
• Check the settings of the (INPUT) 1 knob, (INPUT) 2 knob,
and MIC knob.
3. No sound from a device connected to the AUX IN jack
• Could the external device’s volume be turned down?
Stop
Select songs +
5. Can’t play rhythm styles
• Could something other than Rhythm mode be selected?
Move the
audio data
position -
Move
Reverb on/off
the song
(while stopped,
position hold down for
approximately one
second)
Reverb on/
off (while
stopped, hold
down for
approximately
one second)
Tap tempo (When
the rhythm is
stopped or when
the metronome
is on)
• Could the guitar cable be broken?
• Is the external device connected correctly?
Switch
variations
Select ending
(When the rhythm
is playing)
• Is the guitar cable connected correctly?
• Could the top panel RHYTHM/PLAY knob be set to a low
setting?
• Could the metronome be on?
If the metronome is on (LED lit up), rhythm styles won’t
play; the metronome sound is heard.
5. Can’t switch rhythm styles or memories
• Could Chain be turned on ([CHAIN] button lit)?
• You can’t switch memories during playback.
6. Can’t record
• Is the input level set correctly?
Move
the song
position +
Move the
audio data
position +
Tip: If reverb is on, the setting of the REVERB knob is applied.
Tip: In Rhythm mode when using the CH4 switch to adjust
the tempo, the sound assigned to the metronome is heard
each time you press the switch.
• Is an SD card inserted? (see page 7 “About SD cards”)
• Is there free capacity on the SD card?
• Is it an SD card that the KR-55 Pro can use for recording?
(see page 23 “SD card test function “tESt””)
7. Recorded sound is unsatisfactory or interrupted
• Is the input level set appropriately?
• Could the KR-55 Pro have been subjected to an impact
during recording?
• Is the reverb effect set correctly?
8. Can’t play songs or audio files; no playback is heard
Turn off the power before you connect or disconnect
the foot switch to the FOOT SW jack. If you connect or
disconnect it when the power is on, you risk malfunctions
or damage.
• Is an SD card inserted?(see page 7 “About SD cards”)
Do not press more than one switch at the same time. This
could cause a malfunction.
• Could the KR-55 Pro be in a mode other than Player mode
or Recorder mode?
Note: The BANK switch LED has no function on the KR-55 Pro.
• Does the SD card contain data?
• Could the top panel RHYTHM/PLAY knob be set to a low
setting?
9. Can’t enter Recorder mode or Player mode
• Is an SD card inserted?
• If you cannot enter Player mode, does the SD card contain a
playable audio file (WAV 44.1 kHz 16-bit stereo)?
25
KR-55 Pro Owner's Manual
Error messages
If an error occurs on the KR-55 Pro or on the SD card, the
display shows the following messages.
Crd - bSy (Card-Busy)
The SD card has a slow access speed, and cannot keep up
with recording or playback. Use a different SD card.
• As you repeatedly write or delete songs, the order of the
songs on the SD card can become discontinuous, lowering
the processing capability. If this occurs, back up the
important songs to your computer, and then format the SD
card before using it further.
Err - Crd - *** (Card Error)
An error occurred while accessing the SD card.
Connect the SD card to your computer and check it. If an
error message is displayed, format the SD card.
Err/Un-/SUP/Frt (Error Unsupported [File] Format)
The music data is in a format that the KR-55 Pro cannot play.
Crd - FUL (Card Full)
The SD card has insufficient free capacity. Delete unneeded
songs.
Err - FSY - *** (File System Error)
An error occurred during SD card processing. If this occurs
frequently even after you’ve switched to a different SD card,
please contact your country’s Korg Distributor.
no-Crd (No Card)
No SD card is inserted.
no-dat (No data)
The SD card does not contain a playable audio file.
Un - Frt (Unformat)
The SD card is not formatted.
Other messages
Other messages may be displayed if the KR-55 Pro
experiences an internal problem or malfunction. Please
contact your country’s Korg Distributor.
26
Appendix
Specifications
Input jacks
Rhythm function
MIC IN jacks: XLR-3-32 type (balanced), input impedance 4.7
kΩ, nominal level -43 dBV
Rhythm Styles: 24 rhythm styles, two variations for each
rhythm style, each variation has three patterns (basic, fill-in 1,
fill-in 2).
INPUT 1 jack, INPUT 2 jack (guitar, bass): 1/4" mono phone
jack (unbalanced), input impedance 1 MΩ, nominal level -26
dBV
Tempo: 48–240 bpm
AUX INPUT jack: 1/8" stereo mini-phone jack (unbalanced),
input impedance 10 kΩ, nominal level -17 dBV
Chain function: 30 banks (up to 999 measures can be
registered in each)
Recorder function
Recording format: PCM audio WAV format (file name
extension .wav), 44.1 kHz, 16-bit
Recording time: Depends on the SD card used; approximately
100 minutes per 1 GB
Maximum continuous recording time: 3 hours
Number of songs: Maximum 50
Number of multitrack recordings: Depends on the remaining
free capacity of the SD card
Undo/Redo: Once
Player function
Playback formats: PCM audio WAV format (file name
extension .wav) 44.1 kHz, 16-bit, Stereo
Maximum data size (time): Depends on the memory card
used; approximately 100 minutes per 1 GB (for WAV data)
Maximum number of data files (number of folders): Up to 99
songs (per folder); a total of eight folders M1–M8 inside the
PLAYER folder can be used.
Playlist function: 10 banks (up to 24 songs can be registered
in each)
Mixer effect section
Effects: Reverb effect
Equalizer: BASS, TREBLE
ACOUSTAGE (wide stereo effect)
Tuner function
Scale: 12-note equal temperament
Chromatic
FOOT SW jack: 1/4" stereo phone jack, usable foot switch:
VOX VFS5 foot switch
Output jacks
OUTPUT L/MONO jack, R jack: 1/4" mono phone jack
(unbalanced)
jack: 1/8" stereo mini-phone jack, maximum level: 0 dBV, 30
mW, 32 Ω
Power supply:
DC 9V, six AA batteries
(alkaline or nickel-metal hydride are supported)
Battery life:
approximately 7 hours (when using alkaline batteries)
approximately 7 hours (when using nickel-metal hydride
batteries)
*Varies depending on the batteries used and the conditions
of use
Current consumption
330 mA
Dimensions (W×D×H)
244 x 220 x 68 mm / 9.61" × 8.66" × 2.68"
Weight
1.4 kg / 3.09 lbs (Excluding batteries)
Included items
AC adapter (DC 9V,
)
Option (sold separately)
Foot switch: VOX VFS5
*Specifications and appearance are subject to change without
notice for improvement.
Calibration: 435–445 Hz
Tuning guide tone: Three types (guitar, bass, piano)
Display
7-segment four-digit LED
SD card
Usable cards: SDHC(UHS-I) 4 GB–32 GB recommendation
27
KR-55 Pro Owner's Manual
KR-55 Pro Signal Path
REC LEVEL LED
Mic
MIC IN
REVERB
SEND
PEAK LED
MIC GAIN
REVERB
REVERB
SEND
INPUT 1
Guitar
PEAK LED
INPUT 1 GAIN
INPUT 2
INPUT 2 GAIN
EQ
BASS/
TREBLE
AUX IN
Audio
player,
etc.
ACOUSTAGE
6
RHYTHM MODE
VOLUME
RHYTHM LEVEL
(RHYTHM/PLAY)
RHYTHM
PLAY/
Metronome
METRONOME
RECORDER MODE
PLAY LEVEL
(RHYTHM/PLAY)
SD CARD
REC
RECORDER
METRONOME
PLAY
Metronome
PLAYER MODE
PLAY LEVEL
(RHYTHM/PLAY)
SD CARD
PLAYER
28
HEADPHONES
RHYTHM
METRONOME
PLAY
OUTPUT
L/MONO, R
IMPORTANT NOTICE TO CONSUMERS
This product has been manufactured according to strict specifications and voltage requirements
that are applicable in the country in which it is intended that this product should be used. If you
have purchased this product via the internet, through mail order, and/or via a telephone sale, you
must verify that this product is intended to be used in the country in which you reside.
WARNING: Use of this product in any country other than that for which it is intended could be
dangerous and could invalidate the manufacturer’s or distributor’s warranty.
Please also retain your receipt as proof of purchase otherwise your product may be disqualified
from the manufacturer’s or distributor’s warranty.
©2017 KORG INC.
Published 01/2018