This is a port of the in_cube winamp plugin for XMMS.  It allows you play 
streamed audio files ripped from Gamecube discs.  The formats it supports is 
the same as in_cube.  They are:

DSP
GCM
HPS
IDSP
SPT
SPD
MSS
MPDSP
ISH
YMF
ADX
ADP
RSD
RSP
AST
AFC

Not all audio types are supported.  Please see the following website for 
compatibility: http://www.halleyscometsoftware.com/mboard/gcstreamdb.php