I use
/usr/bin/mplayer -cache 2048 -playlist http://bbc.co.uk/radio/listen/live/r3.asx -vc null -vo null -ao pcm:fast:waveheader:file=/home/andrew/Radio/$(date +%F_%H-%M)-BBCR3.wav
to record broadcast concerts on BBC Radio 3.

Can I listen in to that stream at the same time by using a localhost address as I can with streamripper
gnome-mplayer http://localhost:8000
to avoid two concurrent streams of the same thing

I can not find the mplayer localhost port to use, so any help would be very welcome.