http://bugs.winehq.org/show_bug.cgi?id=21714
--- Comment #7 from Raymond superquad.vortex2@gmail.com 2010-07-31 23:21:38 --- you need to modify midi.c of wineoss.drv
Track 0 to 15 play through TiMidity port 0 Track 16 to 17 play through TiMidity port 1