Apple Workgroup Server 9150/120 - Manual (Page 138)

2 Open the Sound control panel and choose Sound In from the pop-up menu.
The Sound control panel is in the Control Panels folder in the Apple (K) menu.
3 To change the selected sound input device, click the Options button.
The Input Source options appear.
The microphone icon stands for the device connected to the sound input port.
The External Audio icon stands for the device connected to the line input ports.
4 Click the button for the audio device you want to hear, then click OK.
Choosing audio output options
You use the Sound control panel to designate the audio output device and
options you want.
122 Appendix D / Using Stereo Audio
The Built-in icon (the
preset choice) stands
for the computer.
Click the Options button
to see other choices.
If you click Play-
Through, sound from
the selected input
device plays through
the computer’s speaker
or through the device
connected to the sound
output port.
Click a sound source.