Comment 15 for bug 210472

Mar 20 18:18:44 fish-laptop pulseaudio[26345]: core-util.c: Home directory /etc/timidity not ours.
Mar 20 18:18:44 fish-laptop pulseaudio[26345]: lock-autospawn.c: Cannot access autospawn lock.
Mar 20 18:18:44 fish-laptop pulseaudio[26345]: main.c: Failed to acquire autospawn lock

And at any rate, it seems that pulseaudio is trying to start it's own instance for timidity, which just changes the problem from timidity and pulseaudio having problems sharing, to pulseaudio and pulseaudio having problems sharing the audio device. (Of course, if the latter case is already possible, then this may work)