Dr Rhythm DR-55 - Sound Of Music

Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
FACTS
Model
Boss Dr Rhythm DR-55
Type
Drummachine
Synthesis
Analog
Manufactured
1979
Number
?
Our Serial
079200
Polyphony
4 voices
Oscillators
4 VCO
Filter
VCF
Memory
8 patterns with 3 different hihat (16th, 8th or no hihat)
Keyboard
Sound
Smooth analog
Good for
Analog drum sounds
Less good for
Acoustic drum sounds
Miscellaneous
No MIDI, but possibility to sync via DBS
DESCRIPTION
The original for all Dr Rhythm machines! Boss Dr Rhythm DR-55 was the first drummachine
from Roland with the name Boss 1979. The retail price list for a Dr-55 was back in 1st of
January 1982 $195. It has four sounds, one mono output and can be controlled with control
pulses from outside (DBS or CSQ). DR-55 is powered by4 1,5 battery (6V).
● Dr-55 including three programmable sounds:
- Snare
- Rimshot
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
FEATURES
DR-55
Dr.Rhythm is an extremely small and compact programmable rhythm machine. Sixteen different rhythm patterns can
be
loaded into the memory, and will be retained even when the power switch is turned off. Each rhythm pattern is
divided
into sixteen steps with each step loaded one at a time for quick and accurate loading.
The three rhythm sounds are: bass drum, snare drum, and rim shot.
A standard pattern hi hat sound can also be added to each rhythm.
Accents can also be programmed into each pattern. Other machines
such as a sequencer or synthesizer can be used with Dr. Rhythm.
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
OPERATION
PLAY Mode.
Standard rhythm patterns were loaded into memory at the time of manufacture so that Dr. Rhythm is ready to
use right out of the box.
1. Set the controls as shown in the drawing. ([#6] to 1/8 note hi hat, [#7] to A/B Variation,
[#8] to play mode.)
2. Press START [#11] to start the rhythm and STOP [#12] to stop it.
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
OPERATION
Write Mode
Writing a rhythm into memory will erase any previous rhythm pattern written there, so be sure that the
RHYTHM SELECT [#10] and VARIATION [#7] switches are set as desired before writing new patterns.
With Dr. Rhythm, each measure is divided into sixteen steps (or twelve steps). Rhythm patterns are written
into memory separately for each sound, one step at a time for one (or two) measures. For the purposes of
writing rhythm patterns, the patterns should be thought of in terms
of sixteenths. In other words, think of :
as being:
To load this pattern. press [#11]for a 1/16 note and [#12] for a Rest.
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
Names and Functions of the
Controls
[#1] VOLUME Control/POWER Switch
The VOLUME control [#1] also serves as the POWER switch. Turn the
VOLUME control [#1] fully counterclockwise to turn the DR-55 off.
NOTE: The POWER switch function is interlocked to the OUTPUT jack [#14].
If there is no connection at the OUTPUT jack [#14], the DR-55 can not be turned on.
[#2] TEMPO Control
Controls the tempo of the rhythm when played.
[#3] TEMPO Indicator LED
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
USING EXTERNAL DEVICES
1. Using the CSQ-100 Digital Sequencer.
A. DBS jack [#15] is connected to the CSQ-100 STEP INPUT jack.
The CSQ-100 will advance one step each time the DR-55 advances one
step. (one step = sixteenth note).
B. CSQ jack [#16] is connected to CSQ-100 STEP INPUT jack.
The CSQ-100 will advance one step at each point where an accent is programmed.
If the position of RHYTHM SELECT [#10] is changed at the end of each measure.
twelve measures of different melody rhythm can be played.
If the CSQ jack [#16] is connected to the CSQ-100 GATE INPUT jack,
the CSQ-100 GATE REWRITE mode can be used for programming rhythm
patterns loaded into the DR-55.
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
CHANGING BATTERIES
When the batteries have become one year old, or when the
tone color of the percussion sounds begins to deteriorate,
the batteries should be replaced. If the new batteries are
inserted within approximately three minutes of removing
the old batteries, the rhythm patterns contained in the
memory will remain intact.
TO REPLACE:
1. Turn off the POWER switch [#1] ; remove the screw and open the lid.
2. Being careful of the wires, remove the battery case from the
compartment and un-snap the connector from the battery case.
3. Replace the old batteries with new batteries; OBSERVE POLARITY.
4. Re-connect the connector.
5. Being careful not to pinch the wires, replace the battery case
in its compartment.
6. Close the lid and replace the screw.
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
Standard Rhythm Patterns
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Dr Rhythm DR-55 - Sound Of Music
BOSS DR RYTHM DR-55
SPECIFICATIONS :
DR. RHYTHM DR-55
Controls and Switches
VOLUME Control/ POWER Switch [#1]
TEMPO control [#2] (TEMPO Indicator [#3])
TONE Control [#4]
ACCENT Control [#5]
HI HAT Switch (OFF, 8. 12/16) [#6]
VARIATION Switch (A, AB, B) [#7]
MODE Switch (PLAY, WRITE) [#8]
SOUND Switch (BD. SD, RS, AC) [9]
RHYTHM SELECT (l-8) [#10]
START Button [#11]
STOP Button [#12]
Jacks
OUTPUT Jack [#14]
DBS Jack [#15] (output pulse: +5V. 8ms)
CSQ Jack [#16] (output pulse: +4V. 10ms)
FOOT SWITCH Jack [#13] (for FS-1)
Power Supply: 6V dc
Dimensions: 211(w)x 116(d) x 53(h)mm
Weight: 850g
Accessories:
Batteries UM-3
Connection cord (LP-25)
Specifications are subject to change without notice.
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Dr Rhythm DR-55 - Sound Of Music
2. Using the JP-4 Polyphonic Synthesizer
The DBS output [#15] can be used to control the JP-4 arpeggio rate.
3. Using the System 100M Synthesizer
A percussion voice can be synthesized with the System 100M Synthesizer
and triggered from the CSQ jack [#16]. In this way, another voice can be
added to the DR-55 rhythm patterns.
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Dr Rhythm DR-55 - Sound Of Music
Examples: Use the CSQ-100 Digital
Sequencer for percussion voices with pitch or tone color changes.
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Dr Rhythm DR-55 - Sound Of Music
Flashes at the beginning of each measure.
In the PLAY mode, the TEMPO indicator [#3] gives a visual indication of the tempo.
In the WRITE mode, the TEMPO indicator [#3] indicates the point where loading can begin,
and after loading the correct number of steps (12 or 16), it comes on again to indicate that
loading is complete.
[#4] TONE Control
Controls the tone color of the percussion sounds.
[#5] ACCENT Control
Controls the dynamic range of the rhythm patterns. At MIN, the programmed accents will be weak;
at MAX, strong. If accents are not programmed, this control has no effect on the sound.
[#6] HI HAT Switch
This switch is for adding the hi hat sound to the programmed pattern. At OFF, there is no hi hat sound.
At "8", the hi hat sound will occur eight times per measure. At "12/16", the hi hat will occur twelve times
per measure in the 12-beat rhythm and sixteen times for the 16-beat rhythm.
[#7] VARIATION Switch
For each position of RHYTHM SELECT [#10] it is possible to load two rhythm patterns: "A" and "B".
In other words, using the "A" and "B" variations and the eight positions of RHYTHM SELECT [#10],
it is possible to load sixteen separate rhythm patterns.
In the PLAY mode:
At "A" or "B", the "A" and "B" variations are produced. At "AB", the "A" and "B"
patterns are played one after the other in series: A, B. A, B, etc.
In the WRITE mode:
The VARIATION switch [#7] determines which variation memory ("A" or "B")
the pattern will enter when loaded. At "AB", two measures can be loaded in series.
[#8] MODE Switch
Determines whether the DR-55 is in the PLAY mode or WRITE mode. When not actually
programming rhythm patterns, this switch should always be left in the PLAY mode position
to prevent accidental erasure of rhythm patterns.
[#9] SOUND Switch
Used to select sounds and accent when programming rhythm patterns.
BD=bass drum; SD=snare drum;A RS = rim shot; AC = accent
[#10] RHYTHM SELECT
In PLAY mode, determines which rhythm will be played.
In WRITE mode, determines where the rhythm will be written.
[#11] START Button
[#12] STOP Button
In the PLAY mode, these buttons control the start and stop of the rhythm patterns.
Pressing START will always start the rhythm from the beginning of the measure.
When the rhythm is not running, the STOP button [#12] can be used to return the
rhythm sequence to the first beat in the measure.
In the WRITE mode, these buttons are used to load the sound selected with the
SOUND switch [#9] The rhythm is loaded one step at a time. Press [#11] for those
steps where the sound is to occur and press [#12] where no sound is to occur.
[#13] FOOT SWITCH Jack
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Dr Rhythm DR-55 - Sound Of Music
By connecting a foot switch (such as the Roland FS-1, sold separately) to the FOOT SWITCH
jack [#13], it is possible to control the START/STOP function of the DR-55 remotely when in
the PLAY mode.
[#14] OUTPUT Jack
For connection to an amplifier. A cord must be connected to this jack to be able to turn on the POWER
SWITCH [#1].
[#15] DBS Jack
[#16] CSQ Jack
For controlling external devices with the DR-55.
DBS: Outputs a pulse for each step in the rhythm pattern.
CSQ: Outputs a pulse at each step where an accent is programmed.
When this jack is used, accents no longer occur in the programmed rhythm patterns.
With new batteries, the output pulses are:
DBS: +5v, 8ms
CSQ: +4v, 10ms
Remember that these pulse levels will
become lower as the batteries age.
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Dr Rhythm DR-55 - Sound Of Music
Writing 16-Step Patterns
1. Set RHYTHM SELECT [#10] as desired; set the VARIATION switch [#7] at "A" or"B".
In the example, the rhythm pattern will be loaded as rhythm pattern 1-A
2. Set the MODE switch [#8] at WRITE; the TEMPO indicator [#3] should light
indicating the beginning of the measure.
NOTE: The MODE switch [#8] should be changed to the WRITE position only when the
ryhthm pattern is not running.
If the TEMPO indicator [#3] does not light, use either of these two methods:
Press [#12] enough times to light the TEMPO indicator .
Set the MODE switch [#8] at PLAY and press <<STOP>>, then return the MODE
switch [#8] to WRITE.
3. Select the desired sound with the SOUND switch [#9] .
BD=bass drum; SD=snare drum; RS = rim shot; AC = accent in the example,
the bass drum sound has been selected for loading.
4. Write the rhythm using the [#11] and [#12] buttons. After loading sixteen steps;
the TEMPO indicator [#3] will light showing that the measure is fully loaded.
If the TEMPO indicator [#3] does not light, it indicates that the measure has not
been completely loaded.Check by playing the rhythm, or write the rhythm again
from the beginning.
5. Repeat Steps 3 and 4 above for the other two sounds. In the rhythm shown, the
rim shot sound is not used. Set the SOUND switch [#9] at "RS" and press [#12]
sixteen times to clear the memory. If this is not done, the previously loaded rim
shot pattern will be produced when the rhythm is played.
6. To add accents to the rhythm pattern, set the SOUND switch [#9] at "AC" and
press [#11] at those points where an accent is desired and [#12], where accents
are not desired. If no accents are desired at all for the pattern. press [#12] sixteen
times to clear the memory of the previously loaded accents.
7. To check the pattern, set the MODE switch [#8] at PLAY
and press the START [#11] button.
Writing 12-Step Patterns
Set RHYTHM SELECT [#10] at either "7" or "8". Load in the same manner as above, but using twelve steps
instead of sixteen. 12-step rhythm patterns can be used for triple rhythms such as 3/4 and 3/2.
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Dr Rhythm DR-55 - Sound Of Music
Writing 32- and 24-Step Patterns
If the VARIATION switch [#7] is at "AB", the rhythm pattern will alternate between "A" and "B" when played. Often,
the pattern loaded into "B" is a variation of the "A" pattern in order to get more variety during performance; however,
if the two 16-step (or 12-step) measures produced by the "AB" pattern are thought of as one 32-step (or 24-step)
measure, patterns based on 32 and 24 steps can be programmed. To load, set the VARIATION switch [#7]
at "AB" and load 32 steps (or 24 steps with RHYTHM SELECT [#10] at "7" or "8").The TEMPO indicator [#3]
will light once halfway through the pattern, and again at the end of the pattern to indicate that loading is complete.
Example of use:
With a little forethought, It would be possible to load various rhythm patterns such as an
introduction. fill-ins, breaks, etc, into the various memory slots in such a way that the rhythm
part for an entire composition could be produced non-stop by changing the RHYTHM SELECT
[#10] and VARIATION [#7] switches while the rhythm pattern runs. To accomplish this, rhythm
patterns at the beginning of the composition should be loaded into the lower numbered places
of the RHYTHM SELECT switch [#10]. For example, the introduction should be loaded into
position 1. The main rhythm patterns for the composition should be near the center; positions 3
and 4, for example. Position 6 would be used for the close. In this way, the RHYTHM SELECT
[#10] switch need be moved only one step at a time when a change occurs. Changes in
RHYTHM SELECT [#10] and the VARIATION switch [#7] should be made as close to the
bar lines as possible in order to produce a smooth transition.
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Dr Rhythm DR-55 - Sound Of Music
3. Adjust the loudness of the sound with the VOLUME control [#1] and the external amplifier
volume control.
4. While listening to the rhythm, try the TEMPO [#2], TONE [#4], ACCENT [#5],
HI HAT [#6], VARIATION [#7], and RHYTHM SELECT [#10] controls to see
what effect they have. These controls are covered in detail in the following pages.
NOTE: Do not change the position
of the MODE switch [#8].
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Dr Rhythm DR-55 - Sound Of Music
- Bassdrum
●
It also has a fourth pre-programmed sound:
- Hihat
●
The hihat is pre-programmed in 3 modes:
- No Hihat
- 8th
- 16th
●
Rhythm patterns can be saved on 8 places with this cycles:
- 6 patterns with 8th and 16th
- 2 patterns with 12th
There are controllers for:
- Volume (mastervolume)
- Tempo
- Tone-control (common filter)
- Accent
- Start
- Stop
TRIGGERS
There are two 8th inch jacks triggers:
●
DBS Jack 1/8" pulse +5v, 8ms - used on Roland gear that takes triggers
●
CSQ Jack 1/8" pulse +4v, 10ms - used by Roland stuff that isn't made any more (the
100M sequencer??). CSQ = Computer SeQuencer??
A trigger is sent on every 16th note for which you've programmed an accent.
There is also a Foot switch 1/4" for FS1
VIRTUAL DR-55
Play on a DR-55 - online (Keyboardmuseum):
Virtual Boss Dr Rhythm DR-55
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Dr Rhythm DR-55 - Sound Of Music
ORIGINAL PATTERNS
File
File information
Dr-55 Original patterns
htm/jpg
MANUAL
File
File information
DR-55 Manual
DR-55 Back Panel Manual
online from Keyboardmuseum
online
SAMPLES
Complete kit from DR-55, with kick, snare, rimshot & hihat.
File
File information
Boss Dr Rhythm DR-55
Wav, 44.1 K, mono (30 Kb)
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Dr Rhythm DR-55 - Sound Of Music
LINKS
DR-55 Information and Modifications
Hyperreal.org
Review DR-55 Keyboard Magazine June
1980
Sonicstate
User Reviews
To startpage
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