In reply to:

The popping I hadn't noticed before. I think that it is a symptom of the low Q value, pushing the band affected below DC. (In theory anything below Q=0.5 does that). This DC offset should be filtered out in the analog output stages (though AC coupling capacitors), so it shouldn't be a problem wrt to amps or speakers, but the transition between one DC level and another is causing a sharp transient that would get through the filter


What about having the code always set the "0.0dB" values immediately before it sets the "[Off]" values, in empeg_mixer.c?