Problem
You want to mute a layout.
Solution
MFME 2.0
Press Ctrl + M on your keyboard.
MFME 1.1
Go to the Configuration menu and click volume off.
BFMulator
Click on Advanced then Emulator Settings, now click the Sounds tab and uncheck the Enable uPD7759 sound output checkbox.
If you also want to turn off the other sound such as the buttons depressing, the meters ticking and the coins paying out you need to uncheck the Enable machine sounds checkbox.
Once you have altered the settings you need to click apply and close the menu window.
JPeMu
Unfortunately there is no way to mute a layout in this emulator.
You want to mute a layout.
Solution
MFME 2.0
Press Ctrl + M on your keyboard.
MFME 1.1
Go to the Configuration menu and click volume off.
BFMulator
Click on Advanced then Emulator Settings, now click the Sounds tab and uncheck the Enable uPD7759 sound output checkbox.
If you also want to turn off the other sound such as the buttons depressing, the meters ticking and the coins paying out you need to uncheck the Enable machine sounds checkbox.
Once you have altered the settings you need to click apply and close the menu window.
JPeMu
Unfortunately there is no way to mute a layout in this emulator.