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Appendices
MIDI Implementation
The SC-8850 implements additional functionality and parameters over and above the SC-
88Pro, which itself was an expansion of the GS sound generator format. These functions and
parameters are marked by a [8850] symbol. If MIDI messages marked by a [8850] symbol
are transmitted to another GS format sound generator or to the SC-88Pro, those messages
may not be recognized.
1. Receive data
■Channel Voice Messages
●Note off
Status 2nd byte 3rd byte
8nH kkH vvH
9nH kkH 00H
n = MIDI channel number: 0H – FH (Ch.1 – 16)
kk = note number: 00H – 7FH (0 – 127)
vv = note off velocity: 00H – 7FH (0 – 127)
* For Drum Parts, these messages are received when Rx.NOTE OFF = ON for each
Instrument.
* The velocity values of Note Off messages are ignored.
●Note on
Status 2nd byte 3rd byte
9nH kkH vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
kk = note number: 00H – 7FH (0 – 127)
vv = note on velocity: 01H – 7FH (1 – 127)
* Not received when Rx.NOTE MESSAGE = OFF. (Initial value is ON)
* For Drum Parts, these messages are not received when Rx.NOTE ON = OFF for each
Instrument.
●Polyphonic Key Pressure
Status 2nd byte 3rd byte
AnH kkH vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
kk = note number: 00H – 7FH (0 – 127)
vv = key pressure: 00H – 7FH (0 – 127)
* Not received when Rx.POLY PRESSURE (PAf) = OFF. (Initial value is ON)
* The resulting effect is determined by System Exclusive messages. With the initial
settings, there will be no effect.
●Control Change
* When Rx.CONTROL CHANGE = OFF, all control change messages except for Channel
Mode messages will be ignored.
* The value specified by a Control Change message will not be reset even by a Program
Change, etc.
❍Bank Select (Controller number 0, 32)
Status 2nd byte 3rd byte
BnH 00H mmH
BnH 20H llH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
mm = Bank number MSB: 00H – 7FH (GS Variation number 0 – 127), Initial value = 00H
ll = Bank number LSB: 00H – 04H (MAP), Initial value = 00H
* Not received when Rx.BANK SELECT = OFF.
* “Rx.BANK SELECT” is set to OFF by “GM1 System On,” and Bank Select messages will
be ignored.
* Rx.BANK SELECT is set to ON by “GM2 System On.”
* Rx.BANK SELECT is set to ON by power-on reset or by receiving “GS Reset.”
* When Rx.BANK SELECT LSB = OFF, Bank number LSB (llH) will be handled as 00H
regardless of the received value. However, when sending Bank Select messages, you
have to send both the MSB (mmH) and LSB (llH, the value should be 00H) together.
* Bank Select processing will be suspended until a Program Change message is received.
* The GS format “Variation number” is the value of the Bank Select MSB (Controller
number 0) expressed in decimal.
* The SC-8850 recognizes the Bank Select LSB (Controller number 32) as a flag for
switching between the SC-55MAP, the SC-88MAP, the SC-88ProMAP, and the SC-
8850MAP. With a Bank Select LSB of 00H, the map selected by the front panel INST
MAP button will be selected. With an LSB of 01H, the SC-55MAP and with an LSB of
02H, the SC-88MAP, and with an LSB of 03H, the SC-88Pro MAP, and with an LSB of
04H, the SC-8850MAP will be selected respectively.
* Some other GS devices do not recognize the Bank Select LSB (Controller number 32).
❍Modulation (Controller number 1)
Status 2nd byte 3rd byte
BnH 01H vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
vv = Modulation depth: 00H – 7FH (0 – 127)
* Not received when Rx.MODULATION = OFF (Initial value is ON)
* The resulting effect is determined by System Exclusive messages. With the initial
settings, this is Pitch Modulation Depth.
❍Portamento Time (Controller number 5)
Status 2nd byte 3rd byte
BnH 05H vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
vv = Portamento Time: 00H – 7FH (0 – 127), Initial value = 00H (0)
* This adjusts the rate of pitch change when Portamento is ON or when using the
Portamento Control. A value of 0 results in the fastest change.
❍Data Entry (Controller number 6, 38)
Status 2nd byte 3rd byte
BnH 06H mmH
BnH 26H llH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
mm, ll = the value of the parameter specified by RPN/NRPN
mm = MSB, ll = LSB
❍Volume (Controller number 7)
Status 2nd byte 3rd byte
BnH 07H vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
vv = Volume: 00H – 7FH (0 – 127), Initial value = 64H (100)
* Volume messages are used to adjust the volume balance of each Part.
* Not received when Rx.VOLUME = OFF. (Initial value is ON)
❍Pan (Controller number 10)
Status 2nd byte 3rd byte
BnH 0AH vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
vv = pan: 00H – 40H – 7FH (Left – Center – Right),
Initial value = 40H (Center)
* For Rhythm Parts, this is a relative adjustment of each Instrument's pan setting.
* Not received when Rx.PANPOT = OFF. (Initial value is ON)
❍Expression (Controller number 11)
Status 2nd byte 3rd byte
BnH 0BH vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
vv = Expression: 00H – 7FH (0 – 127), Initial value = 7FH (127)
* This adjusts the volume of a Part. It can be used independently from Volume messages.
Expression messages are used for musical expression within a performance; e.g.,
expression pedal movements, crescendo and decrescendo.
* Not received when Rx.EXPRESSION = OFF. (Initial value is ON)
❍Hold 1 (Controller number 64)
Status 2nd byte 3rd byte
BnH 40H vvH
n = MIDI channel number: 0H – FH (Ch.1 – 16)
vv = Control value: 00H – 7FH (0 – 127)
* Not received when Rx.HOLD1 = OFF. (Initial value is ON)
Model SC-8850 Version 1.00 '99.5
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