I don't think anyone has ported a timidity binary, but an old version of the timidity lib is used by sdl mixer (which duke3d and doom use for music, maybe other apps too) so that might be what you're thinking of.
Hello Mr. bullwood. This is HQ speaking. You have just been assigned a new mission...
#1 Code a decent midi app
#2 stop speaking in abbreviations like "thru" and "spkrs" as it confuses your fellow operatives