[Icecast] recipe for streaming soundcard output

[Kristo Käärmann]

Hi all,

I set up icecast and ices today hoping to stream off any sound activity 
that i create on my laptop. It went fine, until i discovered that my 
soundcard only allows to capture mic and cd as input (but not pcm 
output). Streaming the mic input worked fine, but how can I get the pcm 
output?

Are there workarounds for this? I digged into alsa and Jack manuals, but 
couldn't really work it out.

thanks in advance,
Kristo.