How to concatenate 2 or 3 audio files?

[eeduard]

I'm newcomer in Objective-C and have experience only 5 months coding for iPhone.
Thanks for understanding

What I need:
I need to concatenate 2 or more audio files into one, and export result as aiff, mp3, caf or m4a format.

For example:
First audio file containing "You need", second "download" and third "document".
Every audio part depends on actions from user.

I spent 2 days without luck. That place is my last frontier.

I will very appreciate for a piece of code.

Thanks in advance, Ed.

[chucknorris]

Any luck ??, because i have the same problem and not found any sample code that works is very frustrating.

tnkx