Product Description
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1.10 Audio Subsystem
The board supports the Intel High Definition audio subsystem based on the Sigmatel 9221 or 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 90 dB
1.10.1 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
1.10.2 Audio Connectors
The board contains audio connectors on both the back panel and the component side of the board.
The component-side audio connectors include the following:
• Front panel audio (a 2 x 5-pin connector that provides mic in and line out signals for front panel
audio connectors)
• ATAPI CD-ROM (an optional 1 x 4-pin ATAPI-style connector for connecting an internal
ATAPI CD-ROM drive to the audio mixer)
The functions of the back panel audio connectors are dependent on which subsystem is present.
The 8-channel (7.1) audio subsystem is described in Section 1.10.3; the 6-channel (5.1) audio
subsystem is described in Section 1.10.4.
For information about Refer to
The locations of the front panel audio connector and the optional ATAPI
CD-ROM connector
Figure 19, page 58
The signal names of the front panel audio connector Table 19, page 60
The signal names of the optional ATAPI CD-ROM connector Table 18, page 60
The back panel audio connectors Section 2.7.1, page 55
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