Thanx
@ollie
.... now that you tell me there would be no problem if the clap makes clipping as it is a noise and if the noise has a little more noise you should not hear it wrong. I am going to try.
The truth is that it can increase quite well the rms value of the sound wave, and also serves as a small spectrum analyzer, but has problems filtering (Filters some frequencies that should not filter). I will continue perfecting it until it works well ;-)