Normally, xmmsctrl is a depency of xmms so it should be installed by default and what you describe should be already done.

Meanwhile I've found this:
http://web.archive.org/web/200610121..._bug.cgi?id=93

"
I changed the output in my XMMS from ALSA to OSS, and then left it connected to
the same stream I usually listen to (and have the leak on) for at least 8-10
hours. No memory leak occured.

Could it be a leak in the ALSA output, and not something to do with streaming?
"

bunanson, you are running it on a n900? esd and pulseaudio, not sure if that works..

music is still playing here with alsa but the graph I posted look not good since I switched to alsa (1h00)