SpaceMoth VCF

LP Filter

This is an OTA based analog filter with some fluttery sounds. There is a diode daisy chain that is responsible for the flutters when the rez knob is turned up.

led color: diffused red

knob control:
(1) cutoff
(1) rez
(1) fm, bi polar
(1) level volume input

jacks:
(1) audio input
(1) fm input
(1) cv direct input
(1) audio output

pcb trimmer control:
(1) 100k cutoff adjustment (adjust the low range)
(1) 1k sine wave 1v/oct scaler/adj
(1) 500k final output stage loudness adjuster.

i adjusted these filter to barely start saturating, but if you like that big raw sound this is where you adjust it. you will here the adjustment when the level knob is fully turned clockwise.

this filter has a massive low end

http://analoguehaven.com/bluelantern/spacemothvcf/