Mac users interested in Mp3 to ulaw generally download:
A fully new slideshow movie maker application, which compatible with motion, transition and themes three types of Effects, let you combine your Photos into professional-looking movies with any background Music and Hollywood-Level Subtitles....
Additional suggestions for Mp3 to ulaw by our robot:
Records audio from an audio interface (e.g. sound card), encodes it.
Jack sources - uLaw audio input
Express Talk is a free VoIP SIP based softphone for Mac OS X.
compression (GSM, uLaw, ALaw, PCM
