rxt hinted me into some samples he got from mike melanson that arent working in mplayer yet (except flac/wav) if you have other samples and no time to check them, please tell me, and i'll do the research :) from the desc.txt: .ape: Monkeyaudio .flac: FLAC (Free Lossless Audio codec) .m4a: Aplle Lossless (alac) .wma: Windows Media Audio 9 lossless .rmvb: RealMedia Lossless audio .shn: Shorten audio codec i looked up the rest... :) .shn: shorten http://etree.org/shnutils/xmms-shn/ xmms plugin. .wv: WavPack Audio Compression http://www.wavpack.com/ (the windows.zip contains plugins for foobar2000, winamp, nero, and some others, no directshow) source avail. .tta: True Audio Codec http://tta.corecodec.org/ http://www.true-audio.com/ftp/TTACodecs-setup.exe for directshow decoder, but corecodec dshow are notorius for not working in mplayer. source availible , xmms plugin avail audiocodec tta info "trueaud" status working format 0x9999 driver dshow dll "TTADSDecoder.ax" guid 0x680ef885, 0x41cf, 0x4f81, 0xaa, 0x06, 0xb7, 0x24, 0xbc, 0x96, 0x3a, 0x31 says cannot accept source input, using -rawaudio on:format=0x9999 (seriously, i need the ability to force a codec, ignore fourcc, ignore format, also rawaudio needs to lose the on: part). could be a demuxer problem ;\ .la: Lossless Audio http://www.lossless-audio.com/download.htm windows package contains fubar2000 and winamp plugins, no dshow. source availible .ofr: OptimFROG http://losslessaudiocompression.com/ winamp/fubar/xmms plugin, source availible radlight dshow codecs dont work in mplayer as well... ;\ audiocodec ofr info "ofr" status working format 0x6669 driver dshow dll "RLOFRDec.ax" guid 0x68d6728a, 0xd715, 0x492a, 0xa5, 0x7b, 0x8d, 0xda, 0x01, 0xf4, 0x92, 0x1f cant find input pin. .pac: Lossless Predictive Audio Compression http://www.nue.tu-berlin.de/wer/liebchen/lpac.html Important notice: An improved version of the LPAC algorithm was recently chosen as reference model for "MPEG-4 Audio Lossless Coding (ALS)", so I decided to freeze the development of LPAC at its current state. Once standardization is completed, I will supply tools to convert LPAC files into MPEG-4 ALS files (which will not require any reencoding). Another good news is that the MPEG-4 ALS format specification as well as reference encoder and decoder software will be publicly available, providing an opportunity for everyone to use this new standard. More information on MPEG-4 Audio Lossless Coding can be found on the MPEG-4 ALS page. but hey, dead codecs are what mplayer is all abuot! winamp plugin, windows/linux encoder/decoders (Codec DLL is not dshow.) .rka: RK audio http://www.msoftware.co.nz/downloads_page.php winamp plugin, foobar2000 wrapper for winamp plugins? http://www.vesta.dti.ne.jp/~tsato/arc/foo_winamp_input_040824.zip will check wma lossless in a minute...