This is just an announcement of an nsf player for the GP32. It current skips way too much and runs at a fixed 133Mhz (not to mention a fixed 3 minute play time). It looks that NEZamp, from which NSF Player is based, requires at least ~100Mhz to properly render audio for some nsfs. In any case, place nsfplay.fxe in //game/ and all your nsf files in //gpmm/nsf/ (no subdirs). For the curious, the upper left corner is showing the lower/upper bound percent of clock cycles spent on the nsf rendering.
NSF Player (with source)
NSF Player (with source)