Unfortunately, the Android emulator doesn’t always work well with desktop sound. This can cause the desktop speakers to start buzzing just after boot. The emulator also crashes and it’s not possible to close it.

The solution is to turn off sound support in the emulator. You can do this by adding -noaudio to the emulator command line. Open Run Configurations and select the Target tab. Add -noaudio to the ‘Additional Emulator Command Line Options’…

Obviously, you won’t be able to hear or test sound if you use this option.