_MUTE — Returns the master sound mute state.

Syntax:
%_MUTE

The value returned is 1 if the sound is muted, or 0 otherwise.

rem  Check whether the audio is muted:
if %_mute == 1 echo The audio is muted!


See also: the SOUNDVOL command, which sets the master sound volume and mute state; and the _VOLUME variable, which returns the current volume.