BenQ Home Entertainment Series User Manual page 31

Volume
L/R Switch
Power On/Off
Ring Tone
Reset Audio
Adjusts the volume level of the projector's internal speaker or the volume being
output from the audio output jack.
If the Mute function is activated, adjusting Volume will turn off the Mute
function.
The left and right audio channels will automatically swap when selecting On.
Sets the ring tone for the projector On or Off.
The Power On/Off Ring Tone can only be adjusted here. Setting the sound
mute or adjusting the sound level do not affect the Power On/Off Ring Tone.
Returns all of the adjustments you've done under the Audio menu to the factory
preset values.
Menu operation 31