The VideoLAN Forums

Perhaps it won't work for http, but it suffices my needs on local multi-user Win7.
What Arrow1 could do though is to browse the "vlcrc" file (without an extension) for further clues.

Instead, try either

--waveout-volume=x.xxxx
or
--directx-volume=x.xxxx

At least the above work for me.

Perfect!

BTW, the search box in Icecast listing is unresponsive. Could that be fixed in next VLC version as well?