format a proprietary Apple audio format? Isn’t it less compatible with audioplayers?
The instructions I provide on this site import audiobooks into AAC format, an industry standard format. You can get more information from Apple’s AAC page or Wikipedia’s more detailed entry. There are a number of ways in which it is better than the MP3 format, but because it is a newer standard, it may be unsupported on older devices. But as an open standard, anyone can support it, and many do. Details at those links. An important distiction to make is in regards to the Protected AAC format, which is an AAC format track wrapped in Apple’s FairPlay DRM system. These tracks are indeed not compatible with players besides the iPod and iTunes, and other Apple devices. But this is because of the DRM, not because of AAC.