[Alsa-user] how to record a streaming broadcast?

[fogli_beppe\@libero\.it <fog...@li...>]

I'd like to record to a file an on-line streaming bradcast while
I'm at work so I can listen to it whene I come back home.
It's broadcasted through a Macromedia Flash Player
object in a HTML page and there is no way to save it directly.
Anyway, going through the sound card I feel it's possible to capture it.
The source claims that the stream is 128K FM-quality.
Looking in /proc the browser uses /dev/dsp0 and /dev/mixer0
while playing.

Any ideas about how can I do?