Apple Power Macintosh (7100 Series) - Manual (Page 44)

Connecting audio equipment
Your Macintosh can play and record stereo sound from a variety of sources.
You can listen to or reproduce stereo sound by connecting audio equipment
to the sound input and output ports on the computer. If you have an internal
CD-ROM drive, you can also use your computer to play and record sound
from audio compact discs (CDs).
For information on using Macintosh system software to choose audio input
and output options, record an alert sound, or play audio CDs, see the “Sound”
topic of Macintosh Guide, available in the Guide (h) menu.
About your computer’s sound ports
The sound input port is marked with an icon of a microphone. The sound
output port is marked with an icon of a speaker.
When audio equipment is connected to the sound input port (X), you can hear
or record the incoming sound on the computer.
When audio equipment is connected to the sound output port (-), you can
record the sound produced by the computer or play that sound through
external speakers.
Sound
output port Sound
input port
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