Product Description
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1.9 Audio Subsystem
The board supports the Intel
®
High Definition audio subsystem based on the Sigmatel 9220 audio
codec. The audio subsystem supports the following features:
•
Advanced jack sense for the back panel audio jacks that enables the audio codec to recognize
the device that is connected to an audio port. The back panel audio jacks are capable of
retasking according to user’s definition, or can be automatically switched depending on the
recognized device type.
•
Stereo input and output for all back panel jacks
•
Line out and Mic in functions for front panel audio jacks
•
A signal-to-noise (S/N) ratio of 95 dB
1.9.1 Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about
Refer to
Obtaining audio software and drivers
Section 1.2, page 15
1.9.2 Audio
Connectors
The board contains audio connectors on both the back panel and the component side of the board.
The front panel audio connector provides mic in and line out signals for the front panel.
For information about
Refer to
The location of the front panel audio connector
Figure 16, page 50
The signal names of the front panel audio connector
Table 16, page 52
The back panel audio connectors
Section 2.8.1, page 49
1.9.3 8-Channel (7.1) Audio Subsystem
The 8-channel (7.1) audio subsystem includes the following:
•
Intel 82801G I/O Controller Hub (ICH7)
•
Sigmatel 9220 audio codec
•
Microphone input that supports a single dynamic, condenser, or electret microphone
The back panel audio connectors are configurable through the audio device drivers. The available
configurable audio ports are shown in Figure 9.
