It would be difficult to say if it was a Mame issue, or a GameEx issue. GameEx does have the option to run mame without sound in the AUDIO options. That has to do wwith the jukebox, which I don't know if you are using or not. Open your Mame.ini file, and see what your settings are in this section. # # CORE SOUND OPTIONS # sound 1 samplerate 48000 samples 1 volume 0 If you click on my signature and then the topic 'How to ask for help' you will find a section on troubleshooting using the 'runitgame.bat' method. If you would try that, at the minimum you will be able to possibly eliminate GameEx as the cause of the problem. As far as I'm concerned runitgame.bat is severely under utilized when it comes to trouble shooting, and should always be the first step if having a problem running an emulator from GameEX.