CAF(Core Audio Format) is an audio file format developed by Apple in 2005, and is supported by no matter Mac OS X 10.4 and higher, or iOS 5.0 and higher. This format is designed to overcome limitations of some older audio file formats, such as AIFF and WAV. CAF format uses 64-bit file offsets to break the 4GB file size limitation, so it can save hundreds of years of audio in one file. Besides, CAF supports compressed audio codec like AAC, MP3 and ALAC, so it uses less disk space than AIFF. What's more, CAF supports unlimited channels and metadata. CAF has many advantages over AIFF and WAV, however, many other platforms like Windows, and many players do not support CAF format. Converting your files to MP3 (MPEG-1 Layer 3), a universal audio format supported by nearly any player, will make it playable anywhere. Here is a step by step guide to do this at: [url]http://www.faasoft.com/articles/caf-to-mp3.html[/url]