Audio file formats supported by iTunes Posted on Thursday, January 16th, 2014 at 11:42 am. PTWritten by Jim Dalrymple There’s some good information here from Kirk McElhearn. Jeff The only reason I still buy music CDs is so that I can have a lossless version of the songs I love. If Apple were to offer ALAC versions of songs on iTunes, I would have no more need for physical music any more. Sigivald Perfectly good information, but the headline and text are confusing in that they make it sound like those are the formats iTunes can play, not the formats it can encode.iTunes also plays AU, SND, mp4 audio, and Audible.com audio formats.Not very significant, for the most part, but true. Steven Fisher How does mp4 vary from aac?