convert caf on iphone or on server for sharing

I have an app that records short sounds (as caf files) and uploads them to a server. I want to be able to share these sounds so they need开发者_如何学JAVA to be in a more ubiquitous format like mp3. I've got a linux server. Is there anything I can use either on the iphone or the server to perform the conversion?

thanks, Howie

Looks like I solved my own problem, but I'm open to any other solutions.

I've installed Sox and libsnd on my server. If I upload a caf file I can use SoX to convert from caf to mp3.