This module has the modern 3109 filter chip. The older 3109 chip is found in the vintage Roland keyboards like SH-101. What I did is add resonance audio drop out compensation and precision resistors for the exponential converter. The module will easily track 5+ octaves when in full self oscillation. Band pass was also added as a bonus. The band pass steals the show, as many have not heard an SH-101 with band pass.

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  • Acid N Sons VCF Filter
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Perfect Circuit

Burbank, CA, United States
Joined Reverb:2015

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