Moog Music Forum

Hi,

Just got a brand new Sub Phatty, and after I change between some presets, the first note played on new preset emits a loud pop (louder than any note would be otherwise). If I wait 10+ seconds before playing a note, the pop seems to not happen. If I had to guess, I would imagine that a capacitor is discharging somewhere. Is this normal behaviour?

This is nothing like this on my SubPhatty.

Here is a short video to illustrate the issue:

https://youtu.be/uYB-ELJ5lTQ

It only happens between certain presets. Aside from the preset shown in video, it also happens after factory 4-3 preset. Whether it pops also depends on what preset is next, it doesn't affect all combinations.

Thank you.

Looks like the release section of one of the envelope is not finished when switching the preset. It is normal for an analog envelopes to have a certain latency in changing to the new envelope parameters due to their mainly capacity based design.
But I am not sure if the SubPhatty got analog envelopes or digital created, CV via a D/A sending envelope.