YAMS: Yet Another MS20-Style VCF (4HP)

My take on the MS20 voltage-controlled filter - if you want squally, resonant acid sounds then this may well be right up your alley.

Built around an LM13700 transconductance amplifier, this filter uses a pair of red LEDs in the feedback path to make things a little more ... interesting, but other than that it's a straight-up lifting of the classic MS20 design.

Subtle it isn't, but hey it's an interesting sounding filter nonetheless.

Has both low-pass and high-pass inputs, which should be pretty self-explanatory and there's nothing at all to stop you using them both together (hilarity often ensues here, since you'll get a really screwed-up bandpass-style response).

4HP wide - supplied with power cable and mounting hardware.