All Notes Off (7Bh); Omni Mode Off (All Notes Off) (7Ch); Omni Mode On (All Notes Off) (7Dh); Mono Mode On (Poly Mode Off) (All Notes Off) (7Eh) - Casio CT-S1BK Manual

Receive Receipt initializes each performance controller.
7.21 All Notes Off (7BH)
Message Format: BnH 7BH 00H
n: MIDI Channel Number
Receive Receipt releases (key release) all voices that are sounding.
7.22 Omni Mode Off (All Notes Off ) (7CH)
Message Format: BnH 7CH 00H
n: MIDI Channel Number
Receive Receipt performs the same operation as when All Notes Off is received.
7.23 Omni Mode On (All Notes Off ) (7DH)
Message Format: BnH 7DH 00H
n: MIDI Channel Number
Note: This Instrument always operates in Omni Mode Off.
Receive Receipt performs the same operation as when All Notes Off is received.
7.24 Mono Mode On (Poly Mode Off ) (All Notes Off ) (7EH)
Message Format: BnH 7EH 00H
n: MIDI Channel Number
Note: This Instrument always operates in Poly Mode On.
Receive Receipt performs the same operation as when All Notes Off is received.
7.25 Poly Mode On (Mono Mode Off ) (All Notes Off ) (7FH)
Message Format: BnH 7FH 00H
n: MIDI Channel Number
Receive Receipt performs the same operation as when All Notes Off is received.
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Program Change

Message Format: CnH ppH
n: MIDI Channel Number
pp: Program Number (Note1)
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