This Harmonics with PLL in miRack patch adds two modules to mute the output when no notes are being played into the audio input. I used a Rodent V2 distortion module to amplify the audio input and the output into a compressor module to keep the levels up until the input really dies down. The compressor module by itself did not do the job of raising the level enough.

The BogAudio Pressor module has an envelope output so an envelope follower was not needed.