Casio CTK6000 - Manual (Page 22)

Send Sent when an RPN, NRPN message send operation is performed.
Receive Receipt de-selects RPN, NRPN.
11 Mode Message
11.1 All Sound Off (78H)
Message Format: BnH 78H 00H
n: MIDI Channel Number
Send Sent when the local control is set to OFF on the Instrument.
Receive Receipt stops all voices that are sounding.
11.2 Reset All Controllers (79H)
Message Format: BnH 79H 00H
n: MIDI Channel Number
Send Sent when MIDI send related settings are changed.
Receive Receipt initializes each performance controller.
11.3 All Notes Off (7BH)
Message Format: BnH 7BH 00H
n: MIDI Channel Number
Send Sent when MIDI send related settings are changed.
Receive Receipt releases (key release) all voices that are sounding.
11.4 Omni Off (7CH)
Message Format: BnH 7CH 00H
n: MIDI Channel Number
Send This message is not sent by this Instrument.
Receive Receipt performs the same operation as when All Notes Off is received.
11.5 Omni On (7DH)
Message Format: BnH 7DH 00H
n: MIDI Channel Number
22