Modulation Depth; Null; All Sound Off (78H); Reset All Controllers (79H) - Casio AP-220 Implementation Manual

9.20.4

Modulation Depth

Format
Message Format: BnH 64H 05H 65H 00H 06H mmH 26H 00H
n: MIDI Channel Number
mm: Value
Send
This message is never sent.
Receive
Receipt changes the Vibrato Modulation Depth for the tone that is currently selected by the applicable part.
9.20.5

Null

Format
Message Format: BnH 64H 7FH 65H 7F
n: MIDI Channel Number
Send
This message is never sent.
Receive
Receipt deselects RPN.
9.21

All Sound Off (78H)

Format
Message Format: BnH 78H 00H
n: MIDI Channel Number
Send
Sent when an SD card is inserted or removed, and when an SD card operation is performed. (PX-830, AP-420)
Receive
Receipt stops all voices that are sounding.
9.22

Reset All Controllers (79H)

Format
Message Format: BnH 79H 00H
n: MIDI Channel Number
Send
Sent in the following cases.
When the keyboard channel is changed
•
When a recorder function is used
•
Receive
Receipt initializes each performance controller.
18