Solved!I'm using kubuntu gutsy. When I click on the speaker icon in my panel, it brings up kmix. Everything works fine.
When I play (for example) a flash audio from a website, the audio shows up and is controlled by kmix (the pcm slider).
An example of what I am trying to record is at
While I am playing this, at the same time, I run
arecord -c 2 -f dat -v -v fubar.wav
I get a very large wav file with nothing but crosstalk background noise on it.
I also tried mp3record and got the same result.
Is there a way to get arecord (or something similar) to capture this or other audio streams from the web? Or, more generally, anything that is on it's way to my speakers?
I saw another post that suggested:
mplayer -playlist www.your-radio.com
-ao pcm:file=mymusic.wav -vc dummy -vo null
but I don't know how to use this with a flash audio.