MIDI Channel
To set the Q20's MIDI channel:

Press [MIDI]
Turn [VALUE/ENTER] knob to set the Global MIDI Channel (1-16, OMNI)

Block Bypass
CC#  Block(s) Bypassed
12   All EQs
13   All Choruses
14   All Flangers
15   All Phasers
16   All Pitch Shifters / Pitch Detunes / Ring Modulators
17   All Delays
18   All Reverbs
19   All Tremolos / Leslies
71   Block #1
72   Block #2
73   Block #3
74   Block #4
75   Block #5
76   Block #6
77   Block #7
78   Block #8