Are there any inactivity auto-off solutions for a small flea power tube amp?
You could probably adapt this: Project 38
Yeah, ok, that looks good. I'll read up. Thanks.
That's pretty much how you have to do it. It monitors the audio before the power amp.
Is there a work around for the quite passages?
Just make the turn-off delay longer.
I had a similar problem for a project. Here's the solution I devised. How you'd actually implement it would depend on the delay you need. To increase it, add more decade counters. That way, you wouldn't need to worry about quiet/silent intervals in the program material.
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