But of course when you save the file back to the same MP4 file, it doesn't mux it back in. No, that would make too much sense.

I've got wav files I recorded with a Griffin iTalk Pro which I want to convert to AAC to save file space. I noticed that iTunes has a nice option to convert to AAC for Podcast which optimizes for ...

A lossy, open-source alternative to MP3 and AAC, unrestricted by patents. The file format used (at up to 320kbps) in Spotify streaming. WAV (hi-res): The standard format in which all CDs are encoded.

Which format is best? Get wise to the durability of MP3s, the promise of AAC and the pitfalls of Sony's ATRAC. Last in a three-part series. By Michael Calore.

A lossy, open-source alternative to MP3 and AAC, unrestricted by patents. The file format used (at up to 320kbps) in Spotify streaming. WAV (hi-res): The standard format in which all CDs are encoded.

Going from a 128kbps MP3 to a 128kbps AAC file will provide no space spavings, and yet you will likely lose audio quality. (both are "lossy" file formats).

Open iTunes: On your computer open iTunes and select the broken AAC file that you want to fix. Find the location of the AAC file that you want to repair and select it. Convert to MP3 format: After ...