Datasheet

Intel Desktop Board D945GPM Technical Product Specification
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1.9 Audio Subsystem
The board supports the Intel
®
High Definition audio subsystem based on the Sigmatel 9220/9223
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 17, page 56
The signal names of the front panel audio connector Table 18, page 57
The back panel audio connectors Section 2.7.1, page 54
1.9.3 8-Channel (7.1) Audio Subsystem
The 8-channel (7.1) audio subsystem includes the following:
• Intel 82801GH I/O Controller Hub (ICH7DH)
• Sigmatel 9220/9223 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.
For information about Refer to
The back panel audio connectors Section 2.7.1, page 54