Microphone level tester

Just being a nuisance again and throwing in a few ideas!

From using speech-to-text full-time for a few months now, I'm getting a good handle on what the occasional pitfalls are.

One that I've noticed is if your microphone level is accidentally set too low, speech-to-text accuracy naturally declines a lot.

Again, as a Linux user, I'm aware that there are peculiarities in this system that most users won't experience. But the one that I've encountered is whatever setting Zoom has that automatically changes the input levels persisting after leaving a Zoom call.

Just about any time the Whisper performance seems to be lagging a bit, I check my microphone level and usually it's at something like 50%.

I'm guessing that there will be a percentage of people using voice typing for the first time via this extension who will run into all these “rookie errors” and more.

I don't know if a decibel meter could be integrated into the extension, but that’s one idea.

Another is a warning that might display if the input volume is detected to be below a certain threshold. Something like “you’re too quite! Check your mic levels” (etc)