Apple twentieth anniversary mac Manual Do Serviço
Sound
m 16-bit stereo input and output supporting sample rates of 11.025, 22.05, and 44.1 kilohertz (kHz)
m Built-in Bose sound system including Bose bass unit
m Front panel push-button control for volume level and muting
m Front headphone jack
m Built-in omnidirectional electret type microphone
m Sound input and output ports on back of computer
Input level to sound input port
Note: The information in this section applies to the sound input port in the lower rear area of the
computer’s back panel, not to the video audio input port next to the S-video port in the area covered
by the port cover plate.
computer’s back panel, not to the video audio input port next to the S-video port in the area covered
by the port cover plate.
The sound input port (marked with the ≈ icon) has two external sound input modes: low level and
high level.
high level.
To select low or high level, open the Monitors & Sound control panel, click the Sound button, and
choose External Microphone (for low level) or Line Level Input (for high level) in the Sound Output
pop-up menu.
choose External Microphone (for low level) or Line Level Input (for high level) in the Sound Output
pop-up menu.
Recording levels for various input sources
Monitors and sound input source selection
Plug type
Level
External microphone
3-cond
13 mVrms
External microphone
4-cond
250 mVrms
Line level input
3-cond
250 mVrms
Technical
Information
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