Timidity does also have a way of splitting midi-out. If you do
"timidity -Qx,y,...", where x and y etc. are the channels you want to
mute. Or, the other way round, you could do "timidity -Q0,-x,-y,...",
which will mute everything except the channels you specify with the
dashes. I've been pretty satisfied with the airfont soundfont, but I
can't remember offhand where I found it.
HTH,
terrence