Boss BR-1200CD Owner's Manual page 326

Effect parameters assigned to VALUE knobs
Algorithm: VO+ACOUSTIC
Effect Block Parameter
On/Off
Sustain
Compressor (Mic)
Attack
Level
On/Off
Noise Suppressor (Mic) Threshold
Release
On/Off
Body
Acoustic Processor
Mic Distance
Level
On/Off
Sustain
Compressor (Guitar)
Attack
Level
On/Off
Noise Suppressor (Guitar) Threshold
Release
326
Abbreviation
M:COMP ON/OFF
M:COMP SUST
M:COMP ATTACK
M:COMP LEVEL
M:NS ON/OFF
M:NS THRESH.
M:NS REL.
A:AC ON/OFF
A:AC BODY
A:AC MIC.D
A:AC LEVEL
A:COMP ON/OFF
A:COMP SUST
A:COMP ATTACK
A:COMP LEVEL
A:NS ON/OFF
A:NS THRESH.
A:NS REL.