What is an MP3/FLAC?
MP3: A compressed audio format that is popular for downloading across the internet and for use with memory-based audio players and portable media players. FLAC: stands for Free Lossless Audio Codec. Grossly oversimplified, FLAC is similar to MP3, but lossless, meaning that audio is compressed in FLAC without any loss in quality. This is similar to how Zip works, except with FLAC you will get much better compression because it is designed specifically for audio, and you can play back compressed FLAC files in your favorite player just like you would an MP3 file. For more information: http://flac.sourceforge.