Use a lossless audio format to preserve your CD music collection.
If you don’t back up your music, you could lose it all in a hard drive crash.
Use lossless audio formats when burning your digital music library to CDs.

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FLAC is the creation of the nonprofit Xiph.Org Foundation and is also open source.
Audio is encoded using a lossless algorithm that is stored in anMP4 container.
Depending on various factors, a typical audio CD is compressed between 206MB and 411MB.
It isn’t an open source project, but it is free to use.
Files that are encoded in the Monkey’s Audio format have the humorously dubbed APE extension.