VOLUME
LIN - Should not be adjusted.

INV1 - Should not be adjusted.

MIX1 (VOLUME) - Volume adjustment.

INV2 - Should not be adjusted.
MIX2 - Should not be adjusted.
OUT
LEVEL - Dry output level adjust - not normally adjusted.
PAN
PAN - Left to right adjustment.
DISTORTION
OVERDRIVE MA - Amount of modulation provided by EG for distortion.
OVERDRIVE (DISTORT) - Amount of distortion.
DELAY
LEVEL (FX1 SEND) - Send level to OUT3. Normally OUT3 is connected to a delay effect.
REVERB
LEVEL (FX2 SEND) - Send level to OUT4. Normally OUT4 is connected to a reverb effect.