Boss - SE-50

MIDI Channel
Press "UTILITY" enought times to select the MIDI setting mode. MIDI CHANNEL CHANNEL : 1 Press "PARAMETER arrows" to change between CHANNEL or OMNI MODE Press "VALUE arrows" to change the Midi Channel (1-16) or OMNI Mode (on/off) When completed, press "EXIT"
Boss SE-50
MIDI Control
Use "NUMBER arrows" to select he Program Number you want to make a MIDI control setting. Use "PARAMETER arrows" and select MIDI CONTROL. Use "VALUE arrows" to select the CC# (0-31, 64-95). MIDI CONTROL RECEIVE OFF Use "PARAMETER arrows" and select MIDI CTL ASN (MIDI Control Assign). Use "VALUE arrows" to select the parameter. MIDI CTL ASN MASTER LEVEL (this is the parameter you want to control). Use "PARAMETER arrows" and select MIDI CTL MIN and MIDI CTL MAX. Use "VALUE arrows" to select the range within which value changes will be valid. MIDI CTL MIN xxx MIDI CTL MAX xxx Press "WRITE" 2 times to save.