Apple powermac server g3 minitow Service Manual

 Basics

Sound - 67

The I/O cards provide a stereo sound input jack on the back 

of the enclosure for connecting an external Apple PlainTalk 

line-level microphone (not standard equipment on the 

Macintosh Server G3) or other sound source pair of line-

level signals. The sound input jack accepts a standard 1/8-

inch stereophonic phone plug (two signals plus ground). 

  The microphone for the Macintosh LC and LC II does 

not work with the I/O cards.

The AV I/O card provides an additional pair of RCA jacks for 

right and left sound input for an external source, such as a 

TV, VCR, or VTR.

Options in the Monitors & Sound control panel determine the 

interaction between the sound input and output devices. The 

sound circuitry normally operates in one of three modes: