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The DVD-Video and Audio/Video, Audio/Video, and Audio input/output cards provide a stereo sound input jack on the back of the enclosure for connecting an external PlainTalk microphone or other sound source. The sound input jack accepts a standard 3.5-mm stereophonic phone plug (two signals plus ground). The DVD-Video and Audio/Video and Audio/Video input/output cards provide an additional pair of RCA jacks for right and left sound input for an external source, such as a TV, VCR, or VTR.
The Power Macintosh G3 All-in-one computer has a built-in microphone for sound input located near the top of the enclosure.
The 3.5-mm sound input jack accepts either the Apple PlainTalk line-level microphone or a pair of line-level signals.
Note
The Apple PlainTalk microphone requires power from the main computer, which it obtains by way of an extra-long, 4-conductor plug that makes contact with a 5-volt pin inside the sound input jack.
IMPORTANT
The microphone for the Macintosh LC and LC II does not work with the Audio or Audio/Video input/output cards; the cards require the line-level signal provided by the Apple PlainTalk microphone.