This is an envelope follower based on a classic module from the seventies but with some improvements to suit modern needs.
The IN signal is bifurcated to the envelope follower circuit and also to a THRU output, so the original signal is also available for external processing.
The envelope follower has three controls, a switch to select response time (fast, medium, slow), a pot to adjust GATE threshold and a pot to adjust the envelope CV level.
This little module will help you shape the timbre and/or the level envelopes of your sounds. From dynamic envelope filtering to compressor like side chaining there are lots of possibilities to mangle your audio.

- This KIT contains all the parts needed to build a complete ENVF module.

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ENVF DIY - Modwiggler