* aac, ape/mac, bonk, flac, la, mp2, mp3, mp4/m4a/m4b, mpc/mpp/mp+, ofr, ogg, pac, shn, spx, tta, wav, wv
* other media formats decodable by ffmpeg, mplayer, xine or gstreamer (mp1, wma, ra/ram, ac3, dts, mka, asf, avi, mpg/mpeg, wmv, qt/mov, rv/rm/rmvb, flv, 3gp, vob...)

 * aac, ape/mac, bonk, flac, la, mp2, mp3, mp4/m4a/m4b, mpc/mpp/mp+, ofr, ogg, pac, shn, spx, tta, wav, wv
* other audio formats encodable by ffmpeg or gstreamer (ac3, wma, asf...)

 * amaroK >= 1.3 (Amarok script) (http://amarok.kde.org/)
* TagLib >= 1.4 (http://developer.kde.org/~wheeler/taglib.html)

 * Bonk Audio (http://www.logarithmic.net/pfh/bonk)
* FAAC/FAAD (http://sourceforge.net/projects/faac/)
* FFmpeg (http://ffmpeg.mplayerhq.hu/)
* FLAC (http://flac.sourceforge.net)
* GStreamer (http://gstreamer.freedesktop.org/)
* LAME (http://lame.sourceforge.net)
* LPAC (http://www.nue.tu-berlin.de/wer/liebchen/lpac.html)
* Lossless Audio (http://www.lossless-audio.com/)
* Monkey's Audio Port (http://sourceforge.net/projects/mac-port/)
* MPlayer (http://www.mplayerhq.hu)
* Musepack (http://musepack.net)
* OGG Vorbis (http://www.vorbis.com)
* OptimFROG (http://www.losslessaudio.org/)
* Shorten (http://www.hornig.net/shorten/)
* Speex (http://www.speex.org/)
* Streamripper (http://streamripper.sourceforge.net/)
* True Audio (http://www.true-audio.com)
* TwoLAME (http://www.twolame.org/)
* WavPack (http://www.wavpack.com/)
* xine (http://xinehq.de/) + xineadump (http://sourceforge.net/projects/transkode)