Epson 74c - Manual (Page 20)

20 Setting Up the Projector
Amplifying Computer Audio
Your computer probably has its own sound system; however, it may
not be adequate for your presentation. If you need more volume, you
can connect a computer audio cable to take advantage of the
projector’s built-in amplifier and speaker. You can obtain a computer
audio cable (3.5-mm stereo miniplug cable) from a computer or
electronics dealer.
1. Connect one end of the audio cable to the Audio1 jack on the
projector.
2. Connect the other end of the audio cable to your laptop’s
headphone jack or audio-out jack, or your desktop’s
speaker or audio-out port.
3. After you turn on your projector, open the Audio menu and make
sure Audio 1 is selected for the Audio Input setting. See page 51.
If you don’t need to make any other connections, you can plug in
your projector and turn it on. See page 28 for instructions.
note
The Audio menu also lets
you adjust the volume.