Mod BIG MUFF PI - the
mods are all labeled. . . .Red Channel stock
BIG MUFF, except that the two CLIPPING STAGES are selectable- Stock is
2way Silicon diodes, in both stages (switches down)- center position
is no clip for that stage....UP on the left is one Si and a red
LED, UP on the right is an LED, and Si series pair.......many
different clip characteristics there.......it makes a big difference from
side to side, what you square the signal with...............
the Green Channel by passes the tone stage of the stock muff, which (in most useful position) rolls off almost all the BASS from the signal........ bypassing almost leaves TOO much behind, but separate VOL and Gain allows for some adjustment, and results in a second channel (also clipped as set) of "cleaner" Bass Boost .
Third Stage (and final stomp switch) is an internal FEEDBACK
LOOP that trickles some of the OUTPUT
signal (How much is adjusted with the Pot mounted on the front for ease of
Twiddle from standing position) back to the INPUT resulting in Glitchy
interaction between the note you are playing, and the "tone"
generated by the loop......
The feed back eye can have light flashed over it to jerk the amount of feed back quickly up (light on) and back down again, or in the right lighting, the opposite achived by covering it with your foot....if you stop feeding signal ( by removing cord from guitar) and fiddle with knobs and clip switches, (and a lighter?!?) one can "play" the OSCILLATION like a sort of FUZZED UP synth...... fun fun!
See MR. GREEN for further "refinements" to the MUFF.
Adjusting those two Trim pots effects the over all tone as well ("stock" was 10k if memory serves)