[Haskell-beginners] Playing and combining audio files

[Tobias]

Hello,

I'm searching for a library with which I can process audio files (.wav 
or .mp3). All I need is functions with which I can
- play audio files
- concat several audio files to one audio file

Can you suggest a library for this task? I looked through 
http://hackage.haskell.org/packages/archive/pkg-list.html#cat:sound but 
I didn't manage to find ways to do this respectively sample code for this.

Any hints are welcome- thanks,
Tobias