IMPORTANT Although the internal microphone is deactivated when an external sound input device is in use, it’s possible to record sound from more than one sound device at the same time. This can occur because the computer merges sound from devices in the expansion bay, such as an audio CD, with sound from the PC Card slots, such as a television tuner card, and from the internal expansion card slot (called PCI). If two or more devices in these locations produce sound, the sound from all of the devices may be recorded when you use the SimpleSound program or the Monitors & Sound control panel to record. To eliminate the sounds you don’t want to record, remove or turn off the device producing those sounds.
The Macintosh PowerBook also has a stereo sound output port (on the left side of the computer’s case, marked with the - icon) to which you can connect externally powered speakers, an amplifier, headphones, or other audio output devices. The sound output port accepts a standard stereo miniplug, like that used to attach headphones to a portable tape player.
Your computer also has four stereo speakers, which play sound from an audio CD in the
You can adjust sound output quality in the Monitors & Sound control panel. (For instructions, see the “Sound” topic area of Mac OS Guide, available in the Guide [h] menu.) The computer automatically selects the sound output source. If an external device, such as headphones, is connected, sound is routed there; if no external output device is connected, sound plays through the computer’s four speakers.
You can also use the Control Strip to adjust sound volume.
Connecting Additional Equipment | 73 |
