Hello,

Implementing this would require a lot of things (the programming part is probably tedious for Mark Lord), but you need to take the following into account:

1) how sensitive is the microphone you're using
2) where is the microphone placed
etc. etc.

But if you wan't a relative sound level this can probably be done pretty easily.

(But you have this available but just noticing how far you've turned up the volume, if you're using the AutoVolume hack).

Not the answer you were looking for, I suppose :)