sounds like wine isn't setup correctly to work with pulseaudio
and is dominating the sound card

Run the emulator with
Code:
padsp wine /path/to/emulator
this will route the sound through pulse

OSS sends sound directly to the soundcard hardware, so only one sound source can be active per sound card
padsp redirects sound through pulse

Proper solution is to change the options in winecfg, and move sound processing over to ALSA (which pulse supports natively), instead of OSS