Originally Posted by zim2dive
EDIT2: Still no joy after editing the pulse file.
(In case you couldn't tell, I'm down to the shotgun approach here.)
I did have a problem last night with an incorrect ~/.asoundrc which conflicted with the (correct) settings in /etc/asound.conf, preventing snes9x-gtk from outputting audio. I'm using the simple two-line asound.conf on the linked wiki page which sets the default and iec958 devices to the HDMI output of the NVidia card.