Praat

Praat is a curious application that will let you record sounds or import them if you have already recorded them, and analyse them exhaustively.

Spectral, tone, intensity and formant analysis are the four fundamental tests you can perform.

Once finished, of course, you'll be able to manipulate audio tracks and modify them as you like.

Having all the process done can result in a long period of time, but you can create different scripts to automatize tasks and save time.