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1.11 Audio Subsystem
The boards support the Intel High Definition audio subsystem based on the Realtek ALC880 or the
Realtek ALC860 audio codec. The audio subsystem supports the following features:
• Advanced jack sense (front and rear panel) that enables the audio codec to recognize the device
that is connected to an audio port. All 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 jacks
• Multi-streaming capabilities that enable different audio streams to be sent to different audio
devices. Multi-streaming also allows one audio stream to be directed out the back panel while
another audio stream can be directed out the front panel.
• A signal-to-noise (S/N) ratio of 90 dB
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INTEGRATOR’S NOTE
For the front panel jack sensing and automatic retasking feature to function, a front panel daughter
card that is designed for Intel High Definition Audio must be used. Otherwise, an AC ’97 style
audio front panel connector will be assumed and the Line Out and Mic In functions will be
permanent.
1.11.1 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 1.4, page 19
1.11.2 Audio Connectors
The boards contain 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 (a 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 1.11.3; the 6-channel (5.1) audio
subsystem is described in Section 1.11.4.
For information about Refer to
The locations of the front panel audio connector and the ATAPI CD-ROM
connector on the Desktop Board D925XCV
Figure 21, page 68
The locations of the front panel audio connector and the ATAPI CD-ROM
connector on the Desktop Board D925XBC
Figure 22, page 70
The signal names of the front panel audio connector Table 22, page 72
The signal names of the ATAPI CD-ROM connector Table 21, page 72
The back panel audio connectors Section 2.8.1, page 63
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