Optoma EH415 - Manual (Page 43)

English
43
User Controls
Internal Speaker

Off—turn off the internal speaker.

On–turn on the internal speaker.
Mute
Toggle the audio on or off.

Off—the speaker volume and audio out are turned on.

On–the speaker volume and audio out are turned off.
Volume
Press ◄ to decrease the volume.
Press ► to increase the volume.
Audio Input
Press ◄► to select audio source input.
Setup |
Audio Settings