82 lines
3 KiB
Groff
82 lines
3 KiB
Groff
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." Automatically generated text
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.TH 7 "August 31, 2006" "OSS" "OSS Devices"
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.SH NAME
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oss_hdaudio - Intel High Definition Audio (AZALIA)
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.SH DESCRIPTION
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Open Sound System driver for Intels high definition audio known as
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"Azalia". This driver supports Intel 915/925 chipsets with the
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Realtek ALC880 and CMedia 9880 8 channel codecs.
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The HDA driver supports:
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o 8-96Khz Playback/Recording
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o 8 or 16 or 32 bits
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o 2, 4, 6 or 8 channel audio.
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o SPDIF digital output and Input
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o AC3 passthrough
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.SH HDAUDIO MIXER
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The Intel HDA mixer is a new type of mixer that doesn't have
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the normal volume controls found on AC97 or legacy SB devices.
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The HDA mixer presents a concept of Jacks and you can configure
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any jack to be either an output or an input jack.
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Some motherboards may not correctly initialize the jacks according
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to their color and functionality but in general here's the
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configuration that should generally be followed:
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o Orange = Center/LFE o Blue = Line-in
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o Black = Rear o Green = Front
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o Grey = Side o Pink = Mic
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Some Azalia codecs support front panel connectors and so if you see
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fp-green and fp-pink connectors, then these are for front panel
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speaker and mic/line-in Jacks.
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There is a function selector for most of the analog audio jacks (for example
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connector.pink.mode). This selector is used to control if the jack is used
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as an input (microphone or line in) or output (front, rear, side, speaker,
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etc).
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.SH KNOWN PROBLEMS
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In general Azalia based systems (laptops/motherboards) would require a custom
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driver to work properly. Due to enormous number of different systems it is not
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possible to develop such custom drivers for all systems. A generic driver is
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used for systems that don't have dedicated drivers.
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Unfortunately the mixer and control panel interface (see ossmix(1))
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for "generic" systems is very cryptic and difficult to
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understand. To solve problems with volumes or signal routing you need to
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start ossxmix(1) and change the controls one at time until you get the desired
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effect.
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.SH OPTIONS
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.IP \(bu 3
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hdaudio_jacksense enables jack sensing mode when the hdaudio driver is
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loaded. In this mode all I/O pin's that are not
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in use will be disabled as well as the mixer controls
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that are related with them. In this way the
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mixer/control panel will become more intuitive.
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However OSS will need to be restarted with soundoff;
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soundon every time new inputs or outputs are attached
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to the audio jacks. Default : 0.
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NOTE! hdaudio_jacksense=1 works only in some systems.
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Many laptops and motherboards don't support jack
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sensing.
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.IP \(bu 3
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hdaudio_noskip Disable skipping unconnected jack. All mixer controls
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will be shown, even for disabled I/O pins.
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Can get values 0-7. 1-7 is a bitmask, where every bit
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masks a different check. Bit 3 (= value 4) overrides
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jacksense check too.
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Default: 0 - unconnected jacks are skipped.
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.SH FILES
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/usr/lib/oss/conf/oss_hdaudio.conf Device configuration file
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.SH AUTHOR
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4Front Technologies
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