note: this requires the aoss program, which is part of alsa's OSS compatibility package (alsa-oss is a likely package name) How to capture streaming audio with linux http://www.mail-archive.com/linux-au.../msg11959.html The ALSA file plugin can do this. Try putting this in ~/.asoundrc: pcm.fileout { type file slave.pcm "hw:0,0" file alsaout.raw } ...then aplay -D fileout foo.wav will create a file called alsaout.raw Of course, in that case it's easier to just cp foo.wav! It's likely you'll want to record the output from realplayer or something. If you have OSS emulation set in ALSA, try adding this to the same .asoundrc: pcm.dsp0 { type plug slave.pcm "fileout" } then # aoss realplay *should* record realplay output to the same fileout.raw (Note: aoss uses LD_PRELOAD hackery) http://www.mail-archive.com/linux-au.../msg11965.html Audacity had/has a raw importer which [shows] a small graph of the waveform and you could try different combos.