Apple AppleVision monitors (OS 7.1) - Manual (Page 19)

2 Click the Routing button.
3 Select a Routing option.
m Computer: Sound is sent directly from the sound input port on the monitor
to the computer’s sound input port. If you want to record from a device
connected to the monitor, select this option.
m Computer and Speakers: Sound is sent to the computer’s sound input port
and to the speakers on the AppleVision monitor. If you set the Sound Input
Port Gain to -10 dB or 0 dB (called Line Level on some AppleVision
monitors), use the monitor’s built-in microphone, or attach a PlainTalk
microphone to the monitor’s sound input port, sound will only be sent to
the computer even if you select this option.
4 Click OK to save your settings.
Note: After setting the sound output options, be sure you’ve selected the
sound input device you want to listen to or record from. See “Selecting a
Sound Input Source,” earlier in this chapter.
19 Sound Settings