Roland PCR-80 - Manual (Page 113)

113
Operation
The PCR-30/50/80 is a controller that transmits MIDI messages. You cannot perform using only
the PCR-30/50/80 by itself. You will need to connect it to a sound module or computer.
The various controllers ([R1--R8], [S1--S8], [B1--B6], [L1--L3], [P1, P2]) can be assigned almost any
message you want to get the control you need for your particular setup. For details on the messages
that can be assigned, refer to
“Controller settings” (p. 126).