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Version 1.1.18
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Digital Audio

Threedef supports a wide array of the most popular audio formats for playback and CD ripping, so you can enjoy as many available music formats as you like.

For a full list of formats supported for playback and ripping, see our format support page.

We'd like to take this opportunity to endorse the Xiph project, and three associated audio formats: Ogg Vorbis, FLAC, and Speex, which we feel represent the best that digital audio technology has to offer.

  • Ogg Vorbis  
  • The best choice for ripping and storing a large collection of music on a hard drive or portable player. Because Ogg Vorbis stands out with unmatched quality per file size, it's become a de facto standard format for digital music enthusiasts.

    Here's a link to some listening test results posted at

    Check out the Xiph project's Dare to Compare page to compare Ogg Vorbis to some similar formats.
  • FLAC
  • FLAC (Free Lossless Audio Codec) is a lossless compression format. Lossless means that audio stored as FLAC is played back or restored to its exact, original quality. If you rip a CD to FLAC, you get full CD quality audio when you play the FLAC file.

    Though FLAC files are large (usually 3-4 times the size of an Ogg or MP3 file), they're great for archival purposes or backup of CD audio.

    See also Monkey's Audio and OptimFrog.
  • Speex
  • Speex is a codec optimized for storing speech. It offers very high compression ratios for voice data, and is widely used to transmit speech across the internet, such as in voice-over-IP (VOIP) applications. In a media library, Speex is very efficient for storing books on tape or other voice-only audio.