This is a known issue with this emulator to begin with. You'll notice all kinds of posts in their forums about the sound. Best suggestion I can make is that you don't run it windowed. When running this emulator windowed and the screen size is bigger than the smallest size, cracking and popping is heard. So best solution is to run as small as you can or even better, run in fullscreen. Command line: CCS.exe "[ROMPATH]\[ROMFILE]" -autorun In CCS64 change your video settings. Press Alt+V and change the Screen Mode to your desired resolution.