There are a number of different audio file types available for storing music. Which of these file types to use for what purpose can be a source of confusion for many.
Music files can be either compressed or uncompressed. Audio data compression is the reduction of the storage size of audio files. There are three main groups of audio file:
1. Uncompressed
2. Compressed and Lossless
3. Compressed and Lossy
Uncompressed
Uncompressed files are lossless. That is to say that they keep all the audio data and do not reduce the file storage size with compromise to the sound quality. They can consequently be large files which take up more storage space, and so are not practical for storing a full library of music on a home computer.
There are two primary uncompressed file types. The first is .WAV, a Microsoft file created for PC but which can also be played on Macs. The second is .AIFF, an Apple version of the .WAV file which can also be played on PCs.
Compressed and Lossless
These are compressed files which remove only unnecessary data to reduce the file size. The reduction to size is approximately half the original file size.
Common such files types are FLAC, WavPack, Monkey’s Audio and ALAC.
Compressed and Lossy
These are compressed files which reduce much further the file size but with loss to audio quality. To the untrained ear and for everyday use, the loss is largely undetectable and the benefits of the reduced file size in saving of storage space outweigh that loss of quality.
The most popular of these files types are MP3 and AAC.
Protean Music provides all tracks as MP3 and loops as .WAV files. All music is available in .WAV upon request.
See also Use of Music File Types in Royalty Free Music.





