Johannus American Classic 770 User Manual page 30

Pushbutton values
When a piston is pressed, a sys ex code is transmitted with the value of the piston
that is pressed (for example PP = 00 P = 01) through the MIDI MOD. output.
These sys ex codes are only important when the Johannus sound module CSM 128
is connected to your instrument.
Other MIDI codes (transmitted)
Press the cancel piston (CAN) to transmit the sys ex code, 'all stops off' and all
volume settings through the MIDI SEQ. output.
User Manual American Classic 770 29