Yamaha C20A Owner's manual

Yamaha C20A Owner's manual
YAMAHA
SYSTEM CONTROLLER
PROCESSEUR DE CONTROLE DE SYSTEME
SYSTEMSTEUERPROZESSOR
Се СО)
OPERATION MANUAL
MANUEL D'INSTRUCTIONS
BEDIENUNGSANLEITUNG
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FCC INFORMATION (U.S.A)
IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by
Yamaha may void your authority, granted by the FCC, to use the product.
IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s supplied with this product
MUST be used. Follow all installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the USA.
NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class “B” digital devices. Compliance
with these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interfer-
ence with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the
users manual, may cause interference harmful to the operation of other electronic devices. Compliance with FCC regulations does not guarantee that interfer-
ence will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit “OFF” and “ON”,
please try to eliminate the problem by using one of the following measures:
Relocate either this product or the device that is being affected by the interference
Utilize power outlets that are on different branch (circuit breaker of fuse) circuits or install AC line filter/s.
In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300 ohm ribbon lead, change the lead-in to co-axial type cable.
If these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this type of product. If you can not
locate the appropriate retailer, please contact Yamaha Corporation of America, Electronic Service Division, 6600 Orangethorpe Ave, Buena Park, CA 90620
*Thic applies only to products distributed by YAMAHA CORPORATION OF AMERICA
CANADA
THIS DIGITAL APPARATUS DOES NOT EXCEED THE “CLASS
B” LIMITS FOR RADIO NOISE EMISSIONS
FROM DIGITAL APPARATUS SET OUT IN THE RADIO INTER-
FERENDE REGULATION OF THE CANADIAN DEPARTMENT
OF COMMUNICATIONS.
LE PRESENT APPAREIL NUMERIQUE N'EMET PAS DE BRUITS
RADIOELECTRIQUES DEPASSANT LES LIMITES APPLICA-
BLES AUX APPAREILS NUMERIQUES DE LA “CLASSE B”
PRESCRITES DANS LE REGLEMENT SUR LE BROUILLAGE
RADIOELECTRIQUE EDICTE PAR LE MINISTERE DES COM-
MUNICATIONS DU CANADA.
Litiumbatteri!
Bór endast bytas av servicepersonal.
Explosionsfara vid felaktig hantering.
VAROITUS!
Lithiumparisto, Rajáhdysvaara.
Pariston saa vaihtaa ainoastaan aian ammattimies.
ADVARSEL!
Lithiumbatteri!
Eksplosionsfare. Udskiftning má kun foretages af en sagkyndig, —
og som beskrevet ¡ servicemanualen.
*
This applies only to products distributed by YAMAHA CANADA
MUSIC LTD.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT: The wires in this mains lead are coloured in accordance
with the following code:
GREEN-AND- YELLOW : EARTH
BLUE : NEUTRAL
BROWN . LIVE
As the colours of the wires in the mains lead of this apparatus may not
correspond with the coloured markings identifying the terminals in your
plug, proceed as follows:
The wire which is coloured GREEN-AND-YELLOW must be connected
to the terminal in the plug which is marked by the letter E or by the safety
earth symbol or coloured GREEN or GREEN-AND-YELLOW.
The wire which is coloured BLUE must be connected to the terminal
which 1s marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal
which is marked with the letter L. or coloured RED.
Preface
The C20A is an extremely versatile sound-reinforcement speaker system controller
which gives the operator broad control over crossover, equalization, and delay parame-
ters right at the console location. Crossover capabilities include 1-in/3-out operation (HF,
LF and SLF) so a subwoofer can be added when needed, a choice of crossover slopes (6,
12, 18 or 24 dB/oct, symmetrical or asymmetrical) and precisely programmable crossover
frequencies. Equalization parameters allow compensation for room acoustics, suppres-
sion of bass buildup in stacked systems and distance compensation. Delay times can be
precisely set from 0 milliseconds up to 1.3 seconds for time alignment or to compensate
for system offset delays. The C20A also features LF and HF compressors with programma-
ble threshold compression ratio and attack and release times.
The C20A comes with preset programs designed to provide optimum performance
with the Yamaha SI520S, S1525S Speaker System, SM1525 Foldback Speaker System,
SW18205 Subwoofer and Y20, Y25, Y30 Active Servo Processor. 15 user memory loca-
tions are provided so that custom programs can be created and stored for recall when-
ever needed. For maximum system security a number of access modes are provided—
variable (complete access to all parameters), protect (limited access) and Lockout (no
access). Further versatility is provided by a MIDI interface that allows remote program
selection and program up/down loading. There's also a MIDI Link function that allows 2
C20A units to be programmed simultaneously when connected via a MIDI cable.
Superior sound quality is guaranteed by the most advanced digital signal processing
circuitry available. Proprietary 18-bit Delta-Sigma conversion technology provides a dra-
matic improvement in dynamic range and significantly enhances low-level signal perfor-
mance over the more common PCM conversion method. The proof is in the
performance: dynamic range over 100 dB, THD less than 0.03% and a full 20 kHz band-
width.
SERVICE
This product is supported by YAMAHA's worldwide network of fac-
tory trained and qualified dealer service personnel. In the event of
a problem, contact your nearest YAMAHA dealer.
CONTENTS
oi -107. (UNO <TD 3
QUICK FUNCTION GUIDE... cnet teeter reser eran erase sneer ss 4
CONTROLS á CONNECTORS ................eeserecrieniicaceiecca reee accio eee 6
Front Panel
Rear Panel
SETUP AND PROGRAM SELECTION PROCEDURE......................e. eee. 9
Setup and storing programs
Setup á Input Level Matching
Program Selection
DELAY SETTINGS.................eecesrecerrecernecenoececroneroeocceresoceaveverecereceraerrecea ea Eeenee e 10
Time Alignment
Distance Delay Compensation
CHANNEL PARAMETER SETTING ...................evercervesccerreverccrresccarorenenceanreceen. 12
SLF (Super Low Frequency) Channel Parameters
LF (Low Frequency) Channel Parameters
HF (High Frequency) Channel Parameters
Filter Slope Variations
EQ SETTINGS.............enneneneonenioneraeoneneanranereeonanareree ene ranerenenecanerenvenenerennerener ne rUeOe 14
COMPRESSOR /LIMITER SETTINGS................ ennosaraaoenoneatncorenaaneceaanoonaEeanoaNEEmOs 15
MUTE SETTINGS... coor eee seers reer eee 16
PROGRAM STORE rere 16
UTILITY MODE FUNCTIONS ...... errr ere, 17
TITLE EDIT
DELAY DISPLAY UNIT
LEVEL METER (IN, SLF, LF, HF) PEAK HOLD ON/OFF
MIDI CONTROL CHANNEL settings
Setting the MIDI Program Change Table
MIDI BULK OUT
INITIALIZING MEMORY NUMBERS 1 —5
HARD-WIRED PROGRAM SELECTION... DD 19
MIDI LINK . cere errr eee e esse r aaa even 19
SPECIFICATIÓONS:................ reese r eee eas 20
BLOCK DIAGRAM ............rccrrcsocsesesrrerersccrareeneren rene n an resen rence mener ren rene nas ra rence 21
DIMENSIONS eer eraser eae es 21
MID! DATA FORMAT reneeanerenTe |
MIDI IMPLEMENTATION CHART
PRECAUTIONS !! PLEASE READ THIS BEFORE PROCEEDING !!
Avoid Excessive Heat, Humidity, Dust and
Vibration
Keep the unit away from locations where it is likely
to be exposed to high temperatures or humidity —
such as near radiators, stoves, etc. Also avoid loca-
tions which are subject to excessive dust accumulation
or vibration which could cause mechanical damage.
If the C20A is to be rack mounted, make sure that
sufficient ventilation is provided.
Avoid Physical Shocks
Strong physical shocks to the unit can cause dam-
age. Handle it with care.
Do Not Open The Case Or Attempt Repairs Or
Modifications Yourself.
This product contains no user-serviceable parts.
Refer all maintenance to qualified Yamaha service per-
sonnel. Opening the case and/or tampering with the
internal circuitry will void the warranty.
Make Sure Power Is Off Before Making Or
Removing Connections.
Always turn the power OFF prior to connecting or
disconnecting cables.
Handle Cables Carefully
Always plug and unplug cables — including the AC
cord — by gripping the connector, not the cord.
Clean With a Soft Dry Cloth
Never use solvents such as benzine or thinner to
clean the unit. Wipe clean with a soft, dry cloth.
Always Use the Correct Power Supply
The power requirements for the C20A are clearly
marked on the rear panel. Make sure the specified
mains voltage matches the voltage in your area before
using the unit!
Electrical Interference
Since the C20A contains digital circuitry, it may
cause interference and noise if placed too close to TV
sets, radios or similar equipment. If such a problem
does occur, move the C20A further away from the
affected equipment.
9.
10.
Memory Backup
The C20A contains a special long-life battery that
retains the contents of its internal RAM memory even
when the power is turned OFF. The backup battery
should last for approximately 5 years. When the battery
voltage drops to a level that is too low to maintain the
memory contents, the following message will appear
on the C20A display when the power is turned ON:
If this display appears, have the backup battery
replaced by qualified Yamaha service personnel.
DO NOT ATTEMPT TO REPLACE THE BACKUP
BATTERY YOURSELF!
Error Messages
When the C20A is initially turned ON an internal
diagnostic program is run automatically to check over-
all operation. If an error is encountered, one of the fol-
lowing error messages will appear on the MEMORY
display:
EO........ ROM checksum error.
E1........ CPU RAM read/write error.
E2........ Peripheral RAM read/write error.
If an error message appears, have the C20A
checked by qualified Yamaha service personnel and be
sure to tell the service staff which error appeared.
QUICK FUNCTION GUIDE
In order to optimize the performance of any sound rein-
forcement speaker system, the C20A offers the functions
listed on this page. The keys used to access each function
and the corresponding displays are also shown. Refer to
the page numbers given for full details:
e Digital Delay (0 — 1300 ms) —> Page 10.
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1. Independent delays for the HF, LF and SLF chan-
nels allow precise speaker time alignment.
2. An overall system offset delay allows compensa-
tion for distance-related delays between the main
and auxiliary speakers.
Delay values can be displayed in milliseconds,
meters or feet. J
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| a Q: Q factor (F/W) TH: Threshold level
| G F: Center frequency RA: Ratio
W! G: Gain AT: Attack time
RE: Release time
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THE CLIP INDICATORS TURN ON WHEN OUTPUT LEVEL REACHES +8dBm. [El [a В
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|| BEQ || COMP. GAIN PHASE!
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LF
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® Compensation Equalizer ÓN
—> Page 14.
1 2
1. CH-MUTE: Individual channel muting.
Cp Asa 2. MUTE (ALL): All-channel mute. J
Cu 0 e Output Level & Phase —> Page 12.
1. STACKING: Compensates for low-fre- HF € EE. E
quency aberrations in stacked speaker
systems. — EEE Ge
LF
2. DISTANCE: Compensates for distance-
related high-frequency loss. — Sin ANTRO E
3. ROOM COND.: Compensates for dead
or live room conditions.
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FRONT PANEL
CONTROLS & CONNECTORS
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© POWER Switch
Press to turn the power ON or OFF. The output of
the C20A is muted for several seconds after the power
switch is turned ON to prevent possible damage to
power amplifiers and speakers due to the power-on
voltage surge.
The program selected at the time the power was
previously turned OFF will be automatically recalled
with the power is turned ON.
Input & Output Level Indicators
These 8-element LED level meters provide accu-
rate peak-level readings for the input signal and the
output signals at each of the C20A's three outputs—
SLF (super low frequency), LF (low frequency), and HF
(high frequency). The lower 7 segments correspond to
—42, —36, —30, —24, —18, —12 and —6 dB. The highest
segment is a CLIP indicator that warns of circuit over-
load.
[Details on page 9]
MODE Indicators
Indicate whether the C20A is in the “LOCK OUT”
or “PROTECT” access mode. The access modes are
described in “8. MODE Switch” on the following page.
MEMORY Display
This 7-segment LED display shows which of the
C20A's 15 available memory locations is selected —1
through F (hexadecimal: 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C,
D, E, F).
[Details on page 9]
LCD Display
Two 16-character display lines show program
names, parameters and values for easy operation and
programming. The display is backlit for optimum visibil-
ity.
© ¡curso [CURSOR] Keys
The [ — ] and [ = | keys move the cursor left or
right to the desired parameter within the LCD display
screen for editing.
[Details on page 10]
PARAMETER Keys
Ihe PARAMETER | < land | © | keys adjust the
value of the selected parameter.
[Details on page 10]
[DELAY] Key
Accesses the individual delay parameters for the
SLF, LF and HF channels, as well as an overall delay
offset parameter.
[Details on page 10]
[COMP] Key
Accesses the compressor/limiter functions for the
LF and HF channels.
[Details on page 15]
[EQ] Key
Accesses the STACKING, DISTANCE, and ROOM
CONDITIONS compensation EQ for the LF an HF
channels.
[Details on page 14]
[SLF], [LF], [HF] Keys
These keys access the dividing filter gain, and
phase parameters for the SLF, LF, and HF channels.
[Details on page 12]
[STORE] Key
The [STORE] key is used to store newly edited
program data to one of the C20A’s memory locations.
[Details on page 16]
® MEMORY [ © ] and [ © ] Keys
These keys are used to select a desired program
number (1 through F) prior to recalling the selected
program or storing new data into the selected memory
location.
[Details on page 9]
[RECALL] Key
This key recalls a program selected by using the
MEMORY [ < ] and [ <> ] keys.
[Details on page 9]
[UTILITY] Key
The [UTILITY] key accesses a range of utility func-
tions including program title edit, delay display mode
(milliseconds, feet or meters), MIDI controller assign-
ments, MIDI channel selection, and bulk dump opera-
tions.
[Details on page 17]
® [MUTE] Key
Accesses the individual mute functions for each
channel as well as the all-channel mute function.
[Details on page 16]
y INPUT Level Control
Matches the sensitivity of the C20A input to the
source signal. Use in conjunction with the “IN” level
indicator to set up the optimum input leve! for various
signals.
[Details on page 9]
REAR PANEL
level/impedance is +4 dB/150 Q. The pin connections
are the same as for the input connector.
[MODE] Switch
Select the C20A access mode:
* VARIABLE: no protect function is active. Edit and
store operations can be performed.
* LOCK OUT: all front-panel keys are locked out and
have no effect on the C20A's operation. All MIDI
data other than a bulk dump request is also
ignored. Programs 1 through F can be selected via
the REMOTE connector.
* PROTECT: the internal memory is protected and
can not be overwritten by either a front-panel
STORE operation or MIDI bulk data reception. The
chart below indicates which functions can and can
not be accessed in the PROTECT mode:
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@® INPUT Connector STORE NO
Electronically balanced main input to the C20A. RECALL NO
Nominal input level/impedance is +4 dB/10 kQ. EDIT | CHANNEL DELAY NO
The pin connections are: OFFSET DELAY YES
COMP PARAMETERS YES
Pin 1........ GROUND EQ PARAMETERS YES
Pin 2........ HOT SLF PARAMETERS NO
Pin 3........ COLD LF PARAMETERS NO
HF PARAMETERS NO
HF ATT Switch MUTE PARAMETERS YES
This switch can be set to the “+6dB” position to MIDI PROGRAM CHANGE YES
attenuate the level of the HF output by 6 dB. PARAMETER SETUP YES
MEMORY BULK DUMP NO
HF, LF and SLF OUTPUT Connectors PROGRAM CHANGE BULK
Electronically balanced outputs from each of the DUMP NO
C20A channels — HF (high frequency), LF (low fre- SYSTEM SETUP BULK NO
quency) and SLF (super-low frequency). Nominal output REMOTE YES
MIDI IN and OUT Connectors
MIDI IN accepts MIDI program change or control
change messages to select specific memory locations
or control assigned EQ parameters (LINK function),
respectively, MIDI OUT allows program data to be “bulk
dumped” to a second C20A or MIDI data storage
device .
[Details on page 19]
REMOTE Connector
Accepts a custom-built contact-closure system for
remote memory location selection.
[Details on page 19]
SETUP AND PROGRAM SELECTION PROCEDURE
Setup and storing programs
The C20A provides you with the following 5 types of
parameter combinations as preset programs.
@ S1520S
@ S1525S
@ SM1525
@ 815205 + SW1820S
® S1525S + SW1820S
When you use the C20A with a speaker system,
please refer to the instructions of the speaker system
which you will use with the C20A.
Setup & Input Level Matching
Follow the procedure below for setting up and storing
programs.
1. Set the INPUT level control to “0” and set the rear
panel MODE switch to “VARIABLE”.
2. Turn the C20A POWER switch ON (the power amplifi-
ers do not have to be turned ON yet).
3. Feed the program signal to the C20A and , while
watching the IN level meter, gradually rotate the INPUT
level control clockwise. Set the INPUT level control so
that the red CLIP segment of the level meter lights only
occasionally on brief high-level transients.
4. Turn on the power amplifiers and set the relative bal-
ance of the system. It is usually best to balance the
super-low, low and high-frequency levels of the system
by using the input sensitivity controls of the power
amplifiers (or the Y20/Y25/Y30 processor when it is
used). Some fine-tuning of overall balance may also be
accomplished by using the SLF, LF and HF GAIN
parameters (see page 12 & 13) of the C20A. Excessive
attenuation of these digital-domain controls may result
in less-than-optimum signal-to-noise performance.
Program Selection
If you are using the C20A with the S1525S and Y25,
begin by selecting program number 2. Program 2 has been
pre-programmed for optimum performance with these com-
ponents. You should only have to make slight adjustments
to match room conditions.
Memory locations 6 through F contain initial data that
can be used as a basis for original programs designed for
other amplifier and speaker systems. Original programs
can be stored in any memory location by using the store
procedure described on page 16. !f you accidentally erase
the preset data by storing to memory location number, the
utility mode “INITIALIZE NO. 1-5” function makes it possi-
ble to restore the pre-programmed data (see page 18).
1. Use the MEMORY [ © ] and [ <> ] keys to select the
desired program — the selected program number will
flash on the LED display to indicate that the program
has been selected but not recalled (the previously
selected program is still active).
2. Press the [RECALL] key to actually recall and activate
the selected program — the recalled program number
will light continuously.
DELAY SETTINGS
1. Press the [DELAY] key to access the delay parame-
ters. Each time the [DELAY] key is pressed the display
will alternate between the individual channel delay
parameters and the overall delay offset parameter.
2. Usethe[ -« | апа [ = ] key to move the underline cur-
sor to the required parameter (except in the “DLY OFF-
SET” page, which only has one parameter).
3. Use the PARAMETER [ © ] and [ <> ] keys to set the
value of the selected parameter.
The [ © ] or [ 7 ] key can be held for continuous
incrementing or decrementing. Faster incrementing or
decrementing can be achieved by pressing the oppo-
site key while holding the [ © J or [ < | key.
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In this display the S, L and H parameters set the indi-
vidual delay times of the SLF, LF and HF channels, respec-
tively. The delays can be displayed in milliseconds, meters
or feet, depending on the setting of the utility mode DELAY
DISPLAY function (see page 17).
* Di Y (ms) : 0 ... 1300 milliseconds (0.02 ms steps)
* DLY (m) :0... 442 meters (6.8 mm steps)
* DLY(f) :0...1450 feet 1.5 inches (0.27 inch steps)
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The delay offset parameter sets an overall delay offset
for the SLF, LF and HF channels. The delay time for each
channel is the delay offset plus the individual delay setting
for that channel. The DLY OFFSET display also appears in
meters or feet, according to the utility mode DELAY DIS-
PLAY setting.
* DLY (ms) : O... 1300 milliseconds (0.02 ms steps)
* DLY(m) :0...442 meters (6.8 mm steps)
* DLY(f) :0...1450 feet 1.5 inches (0.27 inch steps)
10
Time Alignment
Time alignment is essential to achieving optimum
sound quality in critical multi-amped sound reinforcement
systems and other commercial sound installations. The
C20A makes accurate time alignment quick and easy to
achieve, in addition to providing a high-quality programma-
ble electronic crossover system.
Time alignment makes it possible to eliminate phase
differences between speaker output at the crossover fre-
quencies which, if left unresolved, can cause severe fre-
quency response aberrations and unsuitable imaging at
and around the crossover points. Refer to the example on
next page.
In this example, the 100-millimeter distance between
the zero-phase points of the midrange drivers and high-fre-
quency horn results in almost 180 degrees phase differ-
ence — the worst possible case. This situation can be
resolved quite easily with the C20A by setting the LF chan-
nel delay to about 0.3 millisecond — or 102 millimeters if
the display mode is set to meters. Fine adjustment is best
carried out by ear.
Distance Delay Compensation
In any sound reinforcement setup where rear fill speak-
ers are used to feed sound to audience members located
at some distance from the stage and main house speaker
system — but still within earshot of the main system —
delay between the sound heard from the auxiliary and main
speakers can cause anything from subtle unintelligibility to
complete confusion.
Referring to the diagram on next page, we can see that
even relatively short distances can add up to considerable
delays. Since the speed of sound in the air is approximately
343 meters/1127 feet per second (at 20°C or 68°F), a mere
35 meters results in a delay of around 100 milliseconds —
more than enough to serious degrade the quality of the
sound. Delays of less than about 50 milliseconds can be
ignored because the “precedence effect” causes listeners
to discern only the initial sound, Longer delays, however,
should be compensated. In the example case, the C20A
could be set to delay the auxiliary speaker sound by about
100 milliseconds (35 meters or 115 feet, depending on the
display mode), thereby restoring the integrity of the sound
for all listeners.
Speed of Sound (approx. 343 meters/sec. or 1127 feet/sec.)
Frequency in Hertz
Wavelength =
With a crossover frequency of 5,000
Hz (wavelength = 343/5,000
=0.0686 meters or 68.6 mm), a dis-
tance of 100 mm equals almost one
and a half wavelengths, putting sig- po
nals from the midrange driver and — а
high-frequency horn approximately | Higher frequencies from cone-type
180” out of phase at and around the speaker originate primarily at center
crossover frequency. of cone (dome), while the zero-
I phase point for a horn is generally at
= the mouth of the horn.
| If the zero-phase points of two driv-
ers are not aligned, their output will
I
LA most likely be out of phase at the
14 crossover frequency.
STAGE
MAIN HOUSE SPEAKERS.
a
The auxiliary speaker is located
about 35 meters (115 feet) from the
house speaker. Listener “L” will hear
the sound from the auxiliary speaker
approximately 100 milliseconds
before that from the house speaker.
AUXILIARY REAR SPEAKERS
11
CHANNEL PARAMETER SETTING
The dividing filter parameters for the SLF, LF and HF
channels are accessed and edited in basically the same
way as the delay parameters:
1. Press the [SLF], [LF] or [HF] key to access the.parame-
ters for the desired channel. Each time the (SLE, [LF]
or [HF] key is pressed the next display “page” will
appear.
Use the [ — ] and [ = ] keys to move the underline
cursor to the required parameter.
Use the PARAMETER [ © ] and [ < ] keys to set the
value of the selected parameter.
The [ © ] ог [ © ] key can be held for continuous
incrementing or decrementing. Faster incrementing or
decrementing can be achieved by pressing the oppo-
site key while holding the [ © ] or [ < ] key.
SLF (Super Low Frequency)
Channel Parameters
This display page includes GAIN and PHASE parame-
ters for the SLF channel.
GAIN: +6 dB … 0 dB ... —6 dB (0.5 dB steps)
PHASE: NOR (normal) or REV (reverse)
The “SLF - LPF” display includes the frequency and fil-
ter slope parameters for the SLF channel low-pass filter.
« F (Cutoff Frequency): 40 Hz ... 2 kHz (1/6 oct. steps)
* SL (Slope): THRU, 6, 12BW, 12LR, 18BW, 18LR,
24BW, 24LR
Note: "BW”= Butterworth
“LR”= Linkwitz Riley
see page 13 for an explanation of these filter types.
12
The “SLF - HPF” display includes the frequency and fil-
ter slope parameters for the SLF channel high-pass filter.
* F (Cutoff Frequency): 20 Hz ... 100 Hz (1/6 oct. steps)
» SL (Slope): THRU, 6, 12BW, 12LRD, 18BW, 18LR
LF (Low Frequency)
Channel Parameters
This display page includes GAIN and PHASE parame-
ters for the LF channel.
* GAIN: +6 dB... 0 dB ... —6 dB (0.5 dB steps)
* PHASE: NOR (normal) or REV (reverse)
The “LF - LPF” display includes the frequency and filter
slope parameters for the LF channel low-pass fiiter.
+ F (Cutoff Frequency): 80 Hz ... 10 kHz (1/6 oct. steps)
» SL (Slope): THRU, 6, 12BW, 12LR, 18BW, 18LR,
24BW, 24LR
ama a MERA dde
=.
"rue ewe
The “LF - HPF” display includes the frequency and fil-
ter slope parameters for the LF channel high-pass filter.
e F (Cutoff Frequency): 20 Hz ... 2 kHz (1/6 oct. steps)
e SL (Slope): THRU, 6, 12BW, 12LR, 18BW, 18LR,
24BW, 24LR
or oer ow wo amass
Jonata
[TO
The “LF - PEQ” display includes the Q factor, center
frequency and gain parameters for the LF channel para-
metric equalizer.
* Q (Q factor): 0.1 ... 40 (log steps)
* F (Center Frequency): 20 Hz ... 10 kHz (1/6 oct. steps)
* G (Gain): 40 dB... O dB... +12 dB (1 dB steps)
HF (High Frequency)
Channel Parameters
This display page includes GAIN and PHASE parame-
ters for the HF channel.
* GAIN: +6 dB... 0 dB... —6 dB (0.5 dB steps)
* PHASE: NOR (normal) or REV (reverse)
The “HF - HPF” display includes the frequency and fil-
ter slope parameters for the HF channel high-pass filter.
* Р (Cutoff Frequency): 80 Hz ... 10 kHz (1/6 oct. steps)
e SL (Slope): THRU, 6, 12BW, 12LR, 18BW, 18LR,
24BW, 24LR
13
The “HF - PEC” display includes the Q factor, center
frequency and gain parameters for the HF channel para-
metric equalizer.
* Q (Q facter): 0.1 ... 40 (log steps)
e F (Center Frequency): 80 Hz … 20 kHz (1/6 oct. steps)
* G (Gain): —40 dB ... 0 dB...+12 dB (1 dB steps)
Filter Slope Variations
The 12, 18 and 24 dB/oct. cutoff slopes for the C20A
high-pass and low-pass filters are available in two varia-
tions: “BW” and “LR” . The BW response produces a slope
that is 3 dB down at the crossover frequency, while the LR
response produces a slope that is 6 dB down.
— Filter Response Chart —
|
o
—6
a
2
—
LU
>
LL
ed
FREQUENCY
Note: The optimum settings for a given sound system will
depend on the type of speakers used and other
factors, and are best determined by ear. Aim for a
smooth frequency response, with no noticeable
dips or peaks around the crossover frequency. The
only rule is that the LPF and HPF slopes for the
same crossover point should be set to the same
attenuation value to avoid phase differences that
may adversely affect the response at and around
the crossover frequency.
EQ SETTINGS
Three overall equalization modes are provided to com-
pensate for bass response abberations caused by large
speaker stacks, high-end loss over distance and general
room conditions. Please note that compensation EQ does
not apply to the SLF channel.
1. Press [EQ] key to access the compensation EQ
parameters. Press the [EQ] key as many times as nec-
essary to call the “STACKING”, “DISTANCE” or
“ROOM COND.” display.
Use the PARAMETER [| «© ] and [ <> ] keys to set the
value of the selected compensation mode.
This function attenuates the low frequency output to
compensate for the bass boost that often occurs in stacked
speaker systems.
* STACKING: 1 BOX, 2BOX, 4BOX, 8BOX
The 1, 2, 4 and 8 box settings correspond to an attenu-
ation of 0, —3, —6 or —9 dB at 70 Hz.
— STACKING Response —
[dB]
+2
Sk
10k
[Hz]
50 100 200 500 1k 2k
This function boosts the high frequencies to compen-
sate for the high-end loss that occurs over long speaker to
listener distances.
* DISTANCE: SHORT, MID, LONG
14
The SHORT, MID and LONG settings correspond to a
high-frequency boost of 0, +3 or +6 dB at 7 kHz.
— DISTANCE Response —
[dB]
+6
+4
+2
0
—2
LONG THROW
MID. THROW
SHORT THROW
20k 50k
[Hz]
100 200 500 1k 2k 5k 10k
Adjusts overall response to compensate for dead, nor-
mal or live room conditions.
* ROOM COND.: DEAD, NORM, LIVE
Use the DEAD setting for environments that tend to
absorb and deaden the low and high frequencies.
The NORM setting produces a flat response that is
best for well-designed halls and listening rooms.
The LIVE setting should be used in high reflective envi-
ronments which tend to emphasize the lows and highs.
- ROOM COND. Response —
DEAD
= = = = = = = = — = = = = = = = = = = = —
LIVE
COMPRESSOR/LIMITER SETTINGS
The [COMP] key access four display pages that
include individual compressor/limiter parameters for the LF
and HF channels. No compression/limiting is provided on
the SLF channel.
1. Press the [COMP] key to access the compressor/lim-
iter parameters. Each time the [COMP] key is pressed
the next display “page” will appear.
2. Use the [ — ] and [ = |] keys to move the underline
cursor to the required parameter.
3. Use the PARAMETER [ © ] and [ < ] keys to set the
value of the selected parameter.
The [ <+ ] or [ <> ] key can be held for continuous
incrementing or decrementing. Faster incrementing or
decrementing can be achieved by pressing the oppo-
site key white holding the [ © ] or [ <> ] key.
The above two display pages include the threshold,
ratio, attack time and release time parameters for the LF
channel compressor/limiter.
* TH (Threshold level): —6 dB ... +14 dB (1 dB steps)
* RA(Ratio): 1:1 1.2:1 1.4:1 1.71 2:1 25:1
3:1 5:1 10:1 20:1 40:1 1
* AT (Attack Time): 1 ms... 20 ms
* RE (Release Time): 0.01 sec ... 2.0 sec
The ahove two display pages include the threshold,
ratio, attack time and release time parameters for the HF
channel compressor/limiter.
15
TH (Threshold level): —6 dB ... +14 dB (1 dB steps)
* RA(Ratio): 1:1 1.2:1 1.41 1.7:1 2:1 251
3:1 5:1 10:1 20:1 40:1 co:1
* AT (Attack Time): 1 ms... 20 ms
* RE (Release Time): 0.01 sec ... 2.0 sec
The threshold level determines the input signal level
above which compression or limiting begins.
The “00:1” ratio setting produces limiting while all others
produce varying degrees of compression.
The attack time parameter determines how long it
takes for compression or limiting to begin after the input
signal exceeds the threshold level.
The release time parameter determine how long it
takes before compression or limiting is released after the
input signal falls below the threshold level.
— Ratio & Threshold —
1:1
OUTPUT | 2.1
4:1
=
INPUT
THRESHOLD
LEVEL
— Attack/Release Time with Ratio = co:1 —
INPUT
OUTPUT
mm
PE = = = = = = = =
THRESHOLD LEVEL
IRELEASE TIME!
>!
| 1
MUTE SETTINGS
The [MUTE] key accesses functions that make it possi-
ble to individually mute the SLF, LF or HF channels, or to
mute all channels at once.
The parameters available in this display page allow
SLF, LF and HF channel muting to be turned ON or OFF
independently. Please note that the channel muting func-
tions will only operate if the MUTE (ALL) function (below) is
tuned OFF.
* SLF: ON, OFF
*LF: ON, OFF
* HF: ON, OFF
The selected channel is muted (no output) when its
parameter is turned “ON”.
ae Exa
= 1e 1 4 5
Turn this function ON to mute all three C20A channels
at once.
* MUTE (ALL): ON, OFF
16
PROGRAM STORE
Once you have finished editing a program, it can be
stored to the current memory location for later recall and
use. If you do not store the edited program and a different
program number or mode is selected, the edited program
will be lost (the previous program in that memory location
remains unchanged).
1. When finished editing, press the [STORE] key. A dis-
play similar to the following will appear, asking you to
confirm the fact that you want to store the edited data
to the current memory location.
rer ke
The program number will also flash on the MEMORY
LED display.
2. Press the [STORE] key a second time to actually store
the data. “MEMORY STORE” will appear while the
data is being stored. When the store operation is fin-
ished, the MEMORY LED display will stop flashing.
Note: It is also possible to store edited data to memory
location number 1-5, thus erasing the preset set-
tings. The preset settings can be restored by using
the “INITIALIZE NO. 1-5” function in the utility
mode (see page 17).
UTILITY MODE FUNCTIONS
Utility mode functions include title edit, delay display unit and MIDI setup. These functions do not affect the audio pro-
cess directly.
Use the MEMORY [ <+ ] and [ © ] keys to select the number of the memory you wish
to set. (The display on the left shows the Memory number 1:515205.)
Press the [UTILITY] key once to display the title edit. After this, every time you press
the [UTILITY] key, the function display changes in the following order. However, if you
pressed the [RECALL] key in Utility mode and exited this mode, the display will first show
the display that was shown when you pressed the [RECALL] key, if the unit enters Utility
mode again. You may also use the MEMORY [ < ] and [ < | keys to change the function
display.
You can change the title of any program to your own original name (up to 15 charac-
ters). Move the [ —= ] and [ = |] key underneath the character you wish to change, and
press the PARAMETER [ «> ] and [ <> ] keys to change the character. These changes will
automatically be saved when you exit the Utility mode.
| x TITLE EDIT
e Characters available and the order in which they are displayed.
E|CIDIE | Н |1 КНМ | МО | РЕ
Lt} 5 Ве | а #19 |
Тм | пе L£ | Ll wl
я Э| |=
| ph
rl
Ti
Ga
a
[+
iT
ARTY |
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| 7 I
J
++ |+ |+
—|+
wild put ru
PT [|
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HI
-_ Tr
IH | HOLE
}
“lk || rd
= {WE || | dT
+
[
l= +
J
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«| HO
Ji
I
1
L
= ERES E
id | |
+
E
Tok | Зи
Ja
A
IT
}
515
* You can erase a character by pressing the Memory STORE key.
a a. + un
a ra a»
H
| * DELAY DISPLAY UNIT
You can select the display units for the delay time and offset delay time that are dis-
played by the [DELAY] key. Options are "SECOND", "METER" and "FEET". Use the
PARAMETER [ «> J and [ <> ] keys .
EE METER | / Xx LEVEL METER (IN, SLF, LF, HF) PEAK HOLD ON/OFF
Here you can switch the input/output level meter's peak hold function ON or OFF.
1 |
MIDI CONTROL * MIDI CONTROL CHANNEL settings
DARE 1 MEN Set the MIDI receive/transmit channel using the PARAMETER [ © ] and [ © | keys.
OMNI = The unit receives data on all MID! channels and transmits data on channel 1.
1CH = The unit receives and transmits data on Channel 1.
SCH = The unit receives and transmits data on Channel 2.
: 16CH = The unit receives and transmits data on Channel 16.
y OFF = The unit does not receive or transmit MIDI data.
17
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* Setting the MIDI Program Change Table
Using the MIDI Program Change Table, you can assign a program memory number to
a MIDI Program Change Message (PGM), as shown in the chart below. The program
memory can then be recalled by sending the corresponding Program Change Message.
Move the cursor to the numeric field of PGM, then to the MEM field (Program Memory)
and set the value using the PARAMETER [ & ] and [ < ] keys.
* When the cursor is located on PGM, the PGM value and the
currently selected MEM value can be changed at the same
time. However, when the cursor is located on MEM, only the
MEM value can be changed.
: * |f you set “ —” instead of the MEM value, the memory will not
PGM 128=MEM ? be selected even when the unit receives the Program
Change Message that corresponds with the program number.
PGM 1=MEM ?
PGM 2=MEM
РСМ 3=MEM 7?
D
x MIDI BULK OUT
This setting allows you to select what MIDI data will be transmitted as Bulk Dump to
- an externally connected MIDI device.
ALL -----.......... All the program data (1 through F), Program Change Table and the
Utility mode settings will be transmitted.
Thatis, all the data described below (MEM, PGM-TBL and SYS) will
be transmitted altogether.
MEM ----+-e...... Data from a single program will be transmitted by specifying the mem-
ory number (1 through F). If MEM is set, the data of all programs will
be transmitted.
PGM-TBL ------- Only the Program Change Table data will be transmitted.
SY S-==eeoneoonaaao The Utility mode settings will be transmitted (excluding the Program
Change Table data).
Position the cursor next to one of the above options, then press the [STORE] key to
transmit the Bulk Dump data.
* INITIALIZING MEMORY NUMBERS 1—5
You can initialize (reset) the parameter values for memory numbers 1 — 5 to their
default values (factory setting). Press the [UTILITY] key several times until the display
shown on the left appears. Use the PARAMETER [ © ] and [ <> ] keys to select the mem-
ory number to be initialized.
The upper line on the LCD shows the memory number, and lower line shows the title.
Confirm that the memory number that you wish to initialize is selected, then press the
[STORE] key . After showing the display on the left for a second, the selected memory's
parameter values will be initialized to the factory setting.
o Initializing the data will erase the program data that was stored in that memory number.
If you want to keep the previous data, first move the data to another memory number
before executing initialization.
—e Make sure that the MODE switch on the rear panel has been switched to VARIABLE. If
it is set to PROTECT, pressing the [STORE] key will not allow you to select the memory
number of the data to be initialized.
e |nitialization does not affect the other programs.
Exiting Utility mode (Returning to MEMORY program)
To exit Utility mode, press and hold down the [UTILITY] key for about one second.
18
HARD-WIRED PROGRAM SELECTION
The 9-pin D-SUB REMOTE connector on the C20A
rear panel allows hard-wired remote selection of programs
1 through F. The connector should be wired as follows —
using shielded cable. Also avoid long cable runs which
might pick up noise.
Pins 5 ... 9 must be grounded. Grounding various com-
binations of pins 1 ... 4 selects program numbers 1 through
F as shown in the chart below.
Recalled Program Number
1 2 3 4 5 6 7 8 9 A B с D E F
ТО xXx О x O Xx О Хх O x O x O x O
Pin Status 2 X O O X x O о X x OO x x O O
O=0N.x=0FF) "3 |x x x O O O O x x x x O O Оо О
4 | Xx xX xXx x xXx x x O O 0 0 O O O O
or "time he lonostrumbirod pn me prt ee
| a, | , pin takes priority.
MIDI LINK
If at least one pin (1 ... 4) is grounded, the front panel
keys and MIDI reception are locked out.
This function allows two C20A units connected via a
MIDI cable to be programmed simultaneously. This means
that in stereo setups in which both channels require the
same parameter settings, the editing procedure need only
be carried out once.
In practice, one C20A functions as the “master” and
the other as the “slave”. Connect a MIDI cable from the
MIDI OUT of the master unit to the MIDI IN of the slave
unit. Any parameter changes made on the master unit will
then be transmitted directly to the slave unit as well.
This occurs regardless of MIDI channel settings. The MIDI
link function will not operate, however, if the rear panel
MODE switch is set to the “LOCK OUT” position
19
SPECIFICATIONS
Electrical Characteristics
Frequency Response
Dynamic Range
Total Harmonic Distortion
Input
Number of Inputs
Nominal Level
Input Impedance
Outputs
Conversion Type
Number of Outputs
Nominal Level
Output Impedance
A/D, D/A Conversion
Quantization
Sampling Rate
Delay Time
Memory
Number of Locations
MIDI In/Out
External Control Connector
Displays
Level Meter
Memory Number
Parameter
Power Requirements
U.S. & Canadian models
General model
Power Consumption
Dimensions (W x H x D)
Weight
* 0 dB = 0.775 volts RMS.
*k
xXx
20 Hz — 20 kHz
Greater than 100 dB
Less than 0.03 % (1 kHz)
1 (Electronically balanced)
+4 dB
20 kQ
Delta-Sigma
3 (Electronically Balanced)
+4 dB
150 Q
18 bits
50 kHz
0 — 1.3 sec (0.02 ms steps)
15:1 through F
Program change for memory select, bulk dump for up/down load
9-pin D-SUB (contact-closure memory select)
INPUT/OUTPUT 1 — 3
7-segment LED
16-char. x 2-line, backlit
120 V, 60 Hz
230 V, 50 Hz
22 W
480 x 45.2 x 324 mm (18-7/8”" x 1-3/4” x 12-3/4")
3.8 kg (8 Ibs 6 02)
Specifications and appearance may be changed without notice.
Internal circuit delays result in an overall delay of approximately 0.9 msec even when the individual channel
delays and overall delay offset are set to zero.
20
BLOCK DIAGRAM
|
THE CUP NDICATORS TURN ON WHEN OUTPUT LEVEL REACHES -+1BdBm.
HP РЕ EC COMP, GAIN PHAS
pea AH > [$ Mw
НР = PEC EC COMP, GAIN PHAS
HN > > LS Mur
НР a GAIN PHAS
el A HA
INPUT EEN
Ny SLF
NN = Bm
440 (17-1/2”)
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00
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DT
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— QQ
© | —
Ss &
da >
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D Y 133332385 D — с
|
350 (13-3/4”)
480 (18-7/8”) : W
21
Unit: mm (inch)
MIDI DATA FORMAT
1. Transmission Conditions
[CHANNEL MESSAGE]
PROGRAM CHANGE (CnH) MIDI CH
rr m ——
[SYSTEM EXCLUSIVE MESSAGE]
BULK DUMP (FOH, 43H, OnH)
2. Transmission Data
All MIDI Data to transmitted only when the Transmission Channel is set to OMNI on 1—16.
2-1 Program Change
Transmitted whenever a program is recalled.
>>> MIDI OUT
* Program Change Table Bulk Data [PGM-TBL]
Transmit Program Change Table Data.
status 1111 0000 (FOH) System exclusive
status 1100 nnnn(CnH) nnnn=channel # *1 ID $ 0100 0011 (43H) YAMAHA
lst data Oppp pppp Pppppppp=program # *2 sub status 0000 nnnn(OnH) nnnn=device # *3
format # 0111 1110(7EH) Universal bulk dump
byte count 0000 0001 (01H) header and data
2-2 Bulk Dump у 0000 1010 (ОАН) -138bytes
The data group to be bulk dumped is selected in the header 0100 1100 (4CH) "L"
utility mode bulk dump function - MEM(No.), MEM* 9010 0090 (20m mm
PGM-TBL, SYS, ALL. 0010 0000 (20H) " "
0011 1000 (38H) "8"
* 1 Memory Bulk Data 0011 0111(37H) "7"
; : 0011 0100 (34H) "4"
The data in the currentl; selected memory location is 0011 0110 (36H) "6"
transmitted. 0101 0100(54H) "T" ; Table data
0000 0001 (01H) bank #=1
status 1111 0000 (FOH) System exclusive data Ommm mmmm lst byte *4
ID # 0100 0011 (43H) YAMAHA Ommm mmm 2nd byte
sub status 0000 nnnn(OnH) nnnn=device $ *3
format +4 0111 1110 (7EH) Universal bulk dump Oramm mmmm 127th byte
byte count 0000 0001 (01H) header and data Ommm mmmm 128th byte
0000 0100 (04H) =132bytes check sum Оеее ееее x7
header 0100 1100 (4cH) "L" EOX 1111 0111 (F7H) End of exclusive
3010 Coos aoe ин + System Setup Bulk Data [SYS]
0010 0000(20H) " " Transmit System Data.
0011 1000(38H) "8" |
0011 0111 (37Н) "7" status 1111 0000 (FOH) System exclusive
0011 0110(36H) "6" sub status 0000 nnnn(0nH) nnnn=device # *3
0100 1101(4DH) "M" ; 1 memory data format # 0111 1100(7CH) Universal bulk dump
Ommm mmmm mmm mmmm=memory 4 *4 byte count 0000 0000 (00H) header and data
0000 1111 (OFH) =15bytes
data 0000 aaaa Ist byte *5 header 0100 1100(4CH) "L"
0000 bbbb 2nd byte 0100 1101 (4DH) "м"
) 1 0010 0000(20H) " "
0000 aaaa 121th byte 0010 0000 (208) " "
0000 bbbb 122th byte 0011 1000 (38H) "8"
check sum Оеее ееее x] 0011 0111(37H) "7"
EOX 1111 0111 (F7H) End of exclusive 0011 0100(34H) mA”
0011 0110 (36H) "6"
0101 0011 (53H) "S" ; System data
version + Ovvv vvvv version # (integer)
o All Memory (15) Bulk Data [MEM*] Ovvv vvvv version # (decimal fraction)
cé ” : . data Oddd dddd Delay Unit data
The “1 Memory Bulk Data” described above is trans- 0ddd dddd Peak Hold data
mitted 15 times - once for each memory location. 0ddd dddd MIDI Channel # data
check sum Оеее ееее *7
EOX 1111 0111 (F7H) End of exclusive
* Ali Memory, Program Change Table, and System * Parameter Setup
Setup Bulk Data [All] Transmitted when parameter data is edited.
The “All Memory Bulk Data,” “Program Change Table
Bulk Data,” and “System Setup Bulk Data” transmis- status 1111 0000 (FOH) System exclusive
sions described above are carried out in sequence. ID # 0100 0011 (43H) YAMAHA
sub status 0000 nnnn(OnH) nnnn=device # *3
format # 0111 1100 (7CH) Condition setup
byte count 0000 0000 (00H) header and data
0001 0001 (11H) =17bytes
header 0100 1100 (4CH) "L"
0100 1101 (4DH) "M"
0010 0000 (20H) " "
0010 0000 (20H) " "
0011 1000 (38H) "8"
0011 0111 (37H) "7"
0011 0100 (34H) "4"
0011 0110 (36H) "6"
0101 0000 (50H) "P" ; Parameter
change
0010 0000 (20H) " "
version # Quvv vvvv version # (integer)
Ovvv vvvv version # (decimal fraction)
data Oppp pppp parameter #
0000 aaaa lst data *6
0000 bbbb 2nd data
0000 сссс 3rd data
0000 dddd 4th data
check sum Оеее ееее x]
EOX 1111 0111 (F7H) End of exclusive
3. Reception Conditions
MIDI OMNI [CHANNEL MASSAGE]
MIDI CH © > PROGRAM CHANGE (CnH)
1— 16
Mi
DEIN - <> [SYSTEM EXCLUSIVE MESSAGE]
$— BULK DUMP (FOH, 43H, OnH)
O OFF
— > BULK DUMP REQUEST (FOH, 43H, 2nH) 2nH)
4. Reception Data * System Setup Bulk Data [SYS]
The data received is the same as that described in
“System Setup Bulk Data” in the preceding “Transmis-
sion Data” section.
4-1 Program Change
The data received is the same as that described in
“Program Change” in the preceding “Transmission
Data” section. * All memory, Program Change Table, and System
Setup Bulk Data [ALL]
4-2 Bulk Dunp The data received is the same as that described in “All
* 1 Memory Bulk Data Memory, Program Change Table, and System Setup
The data received is the same as that described in “1 Bulk Data” in the Preceding “Transmission Data” sec-
Memory Bulk Data” in the preceding “Transmission tion.
Data” section. * Parameter Setup
* All Memory (15) Bulk Data [MEM*] The data received is the same as that described in
The data received is the same as that described in “Ail “Parameter Setup” in the preceding “Transmission
Memory (15) Bulk Data” in the preceding “Transmis- Data” section. The parameters of the currently selected
sion Data” section. program are changed accordingly when this data is
* Program Change Table Bulk Data [PGM-TBL] received.
The data received is the same as that described in
“program Change Table Bulk Data” in the preceding
“Transmission Data” section.
4-3 Bulk Dump Request
+ Memory Data Bulk Dump Request
1111
0100
0010
0111
0100
0100
0010
0010
0011
0011
0011
0011
0100
status
ID #
sub status
format #
header
0000 (FOH)
0011 (43H)
nnnn (2nH)
1110 (7EH)
1100 (4CH)
1101 (4DH)
0000 (20H)
0000 (20H)
1000 (38H)
0111(37H)
0100 (34H)
0110 (36H)
1101 (4DH)
Ommm mmmm
EOX 1111
1111
0100
0010
0111
0100
0100
0010
0010
0011
0011
0011
0011
0101
0000
EOX 1111
status
ID #
sub status
format #
header
status 1111
ID # 0100
sub status 0010
format # 0111
header 0100
0100
0010
0010
0011
0011
0011
0011
0101
0010
EOX 1111
NOTE
0111 (F7H)
0000 (F OH)
0011 (43H)
nnnn (2nH)
1110 (7EH)
1100 (4CH)
1101 (4DH)
0000 (20H)
0000 (20H)
1000 (38H)
0111 (37H)
0100 (34H)
0110 (36H)
0100 (54H)
0001 (01H)
0111 (F 7H)
0000 (FOH)
0011 (43H)
nnnn (2nH)
1110 (7EH)
1100 (4CH)
1101 (4DH)
0000 (20H)
0000 (20H)
1000 (38H)
0111 (37H)
0100 (34H)
0110 (36H)
0011 (53H)
0000 (20H)
0111 (F7H)
System exclusive
YAMAHA
nnnn=device # *3
Universal bulk dump
nr
"М"
LL "т
ng r
#7 "
" 4 "
n 6"
"M" ; 1 memory data
mmm _mmmm=User's
memory # *4
End of exclusive
Program Change Table Buik Dump Request
System exclusive
YAMAHA
nnnn=device # *3
Universal bulk dump
"MT,"
"М"
"ou
ou
nw
u 6"
nT" > Table data
bank #=1
End of exclusive
System Setup Data Bulk Dump Request
System exclusive
YAMAHA
nnnn=device # *3
Universal bulk dump
"1,"
“M
nou
nin
пд"
N 6"
"Ss" ; Syetem data
End of exclusive
* 1 nnnn=0 (channnel 1) -15 (channel 16)
* 2 ppppppp=0 (program 1) ~127 (program 128)
* 3 nnnn=0 (device 1) ~15 (device 16)
*4 mmmmmmm=1 (MEM 1) ~15 (MEM15)
* 5 The upper and lower 4 bits of each byte are sepa-
rated and transmitted as 2 bytes.
For example, the byte “aaaa bbbb” are transmitted
as follows:
aaaa bbbb — 0000 aaaa
0000 bbbb
* 6 1-byte and 2-byte data is separated into 4-bit
groups and transmitted as 4 bytes.
For example, the two bytes “aaaa bbbb cccc dddd”
are transmitted as follows:
aaaa bbbb — 0000 aaaa
0000 bbbb
cccc dddd > 0000 сссс
0000 ddd
The single byte “cccc dddd” is transmitted as fol-
lows:
0000 0000
0000 0000
cecc dddd — 0000 cccc
0000 dddd
* 7 “eeeeeee” is the two's complement of the lower 7
bits of the sum of the header and data bytes.
* 8 Parameter number
YAMAHA [ System Controller ] Date : 6/9, 1992
Model C20A MIDI Implementation Chart Version 1.1
фоне = = = = = be == = = = = = = = = = = = = = = — == = = = — — = = = = — = = = = = = = = = = = = = = = — — = +
: : Transmitted Recognized Remarks :
: Function : м
$ = = = = = = = = = = = = = = = = = — — + = = = = = = = = = = = = = = = = + = = — = = = = = — = = = = = = = + — = — = = = = = = = = = = = = = $
: Basic Default : 1] - 16, off 1 - 16, off memorized :
“Channel Changed : 1] - 16, off 1 - 16, off :
® = = = = = = = = == = = = = — = = = — — Жо = — — = — = == = = = = = = = == = + == = = = = = = = = = = = = = = = + = = == == = = = = = = = = — == == == :
: Default : x OMNIoff/OMNIon memorized :
Mode Messages ‘ X X :
Altered eje of ok ok of ok ok sk of ok ok ok ok ok X
{= = = = = = = = = = = = = = = = = = = + = = = = = = = = = = = = = = = = + = = = = = = = = = = = = = = = = + = = == = = = = = = = = = = = = ;
в № {те . Хх X :
: Number True voice: ka ok ok ok oi die ae die ak ce X :
$ = = = = = = = = = = = = = = = = = = — + = = = = = = = = = = = — = = = = + = = = = = = = = = = = = = = = = + = = = = = = = = — — — — — = = = :
:Velocity Note ON Хх X :
: Note OFF 1 X X ;
® ет == = ет ое отт == == == == == == == = = == — — == Чон = == ее == == = = = = == == == == == == + = == == = = = — == — == == == == == = == a Y
After Key's . X X :
Touch Ch's : X X :
р = = = = = = = = = = = = = = = = = = — + = — = = = = = = = = = = = = = = + = = = = = = = = = = = = = = = = + = = = = = — — — = = = = = = = = :
Pitch Bender о Хх X :
2------------------- + = — = = = = = = = = = = = = = = + = = = = = = = mmm mmm mmm mm mmm mmm m= =)
: : x x :
‚Control :
:Change :
Ñ TT + AA .
:Prog : 0 0 - 14 o 0 - 127 *1 :
Change True # A EEE EEE EEES :
в = — = = = = = = = = = = = = = = — = = + = = = = = = = = = = = = = = = = + = = — — = = = = = = = = = = = = + — == — — = = = = = = = = = = = = :
System Exclusive : 0 O :
р == = == = = = = = = — = = = = = — — + = = = = = = = = = = = = = = = = + = = = = = = = — — = — = = = = = + = = = = = = = = = = = = = == ;
:System Song Pos : X x :
: Song Sel : X x :
: Common Tune : X x :
в == = = = = — = = = = = = = = — = = — + = = = = = = = = = = = = = = = = + = = = = = = = = = = — — = = — = + = = = = = — = = — — — — — — — = :
System Clock Xx X :
‚Real Time :Commands: x X
A be ee aaa 8
Aux :Local ON/OFF : x X
:All Notes OFF: x X
Mes- :Active Sense : x X :
sages: Reset TX X :
№ нет a nn nn nn + aaa == = = ен 4 ен ев =в ем == ее жк мч ет те сл ожто мл ен = = Da Y
Notes: %1 = For program 1 - 128, memory #1 - #F is selected. :
aaa aaa +
Mode 1 OMNI ON, POLY Mode 2 OMNI ON, MONO 0 Yes
Mode 3 OMNI OFF, POLY Mode 4 OMNI OFF, MONO X No
YAMAHA
VP15760 | R2 1 CR
YAMAHA CORPORATION
95 06 500 CR Printed in Japan P.O.Box 1,Hamamatsu Japan
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