For analysys of sound files try this:
http://www.sonicvisualiser.org/
Handle also mp3 files

Ciao

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>From      : "Jonas Nyström" jonasnys@gmail.com
To          : csound@lists.bath.ac.uk
Cc          : 
Date      : Sun, 5 Aug 2007 23:04:00 +0200
Subject : [Csnd] Tools for reading wav and mp3 properties, creating wave graphics etc...

> Hi audio programming experts!
> 
> Could anyone point me in the direction of some tool(s) for finding
> properties of audio files (wav and mp3)?
> For example finding
> 
>    - Length (seconds, milliseconds)
>    - Exact file size
>    - Properties like nr of channels, bit-depth, sampling-freq, bitrate,
>    encoding type...
>    - Peak level (dB)
>    - ...
> 
> I'm also looking for a tool for creating a graphical image representing the
> wave amplitude (just like the wave graphs in audio editors).
> 
> I prefer open source tools (well, who doesn't?) and I want to run them on my
> Linux Ubuntu 7.04 server.
> 
> Thank you in advance!
> 
> / Jonas Nyström
>