audio810(7D) Devices audio810(7D)NAMEaudio810 - Intel ICH series, nVidia nForce series and AMD 8111 audio
core support.
DESCRIPTION
The audio810 driver provides support for AC 97 audio controllers embed‐
ded in Intel ICH, nVidia nForce, and AMD 8111 chips.
API
This interface is described in the mixer(7I) and audio(7I) man pages.
Driver Versions
Applications that open /dev/audio may use the AUDIO_GETDEV ioctl(2) to
determine which audio device is being used. The audio810 driver returns
the string SUNW,audio810 in the name field of the audio_device struc‐
ture. The version field contains a letter "a" and the config field con‐
tains the string onboard1.
Platform Ver. Out H. Phone Spkr. In Mic. CD
Sun W1100z/ a Y Y Y Y Y Y
W2100z
workstation
Key to the above table: Ver. = Version. Out = Line Out. H. Phone = Head
Phone. Spkr = Internal Speaker. In = Line In. Mic. = Microphone. CD =
CD=ROM.
The audio810 device provides support for the internal speaker, head‐
phone, line out, line in, and microphone. The play.mod_ports and
record.mod_ports fields of the audio_info structure (see audio(7I))
indicate which ports may be manipulated.
Audio Mixer Mode
This driver supports the mixer mode only. (Compat mode is not sup‐
ported).
Audio Data Formats
The audio810 device supports 16-bit linear encodings in stereo. With
the mixer enabled, a continuous range of sample rates from 5510 to
48000 Hz is supported. With the mixer disabled, only sample rate 48000
Hz is supported. This is limited by hardware capability. The device can
be opened for simultaneous play and record whether the mixer is enabled
or not.
Sample Granularity
Because the audio810 device manipulates buffers of audio data, the
reported input and output sample counts will vary at any given time
from the actual sample count by no more than the size of the buffers
the audio810 driver is transferring. In general, programs should not
rely on the absolute accuracy of the play.samples and record.samples
fields of the audio_info structure.
Interrupt Rate
The driver determines how often play and record interrupts should take
place. For playing audio, this determines how often and how much audio
is requested from the audio mixer. The impact of interrupts on record‐
ing is minimal. However, if a very small read buffer size is set, the
record interrupt rate should be increased to prevent the buffer from
overflowing. The play and record interrupt rates are tunable in the
/kernel/drv/audio810.conf file.
Audio Status Change Notification
As described in the audio(7I) and mixer(7I) man pages, it is possible
to request asynchronous notification of changes in the state of an
audio device.
ERRORSaudio810 errors are described in the audio(7I) man page.
FILES
/dev/audio
Symbolic link to the system's primary audio device. (Not necessar‐
ily an audio810 audio device).
/dev/audioctl
Control device for the primary audio device.
/dev/sound/0
Represents the first audio device on the system. (Not necessarily
an audio810 audio device).
/dev/sound/0ctl
Audio control for /dev/sound/0.
/usr/share/audio/samples
Audio sample files.
/kernel/drv/audio810.conf
audio810 driver configuration file.
ATTRIBUTES
See attributes(5) for a descriptions of the following attributes:
┌────────────────────┬──────────────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼──────────────────────────────────────┤
│Architecture │PC-based system │
├────────────────────┼──────────────────────────────────────┤
│Availability │SUNWaudd, SUNWauda │
├────────────────────┼──────────────────────────────────────┤
│Stability level │Evolving │
└────────────────────┴──────────────────────────────────────┘
SEE ALSOmixerctl(1), sdtaudiocontrol(1), ioctl(2), attributes(5), audio(7I),
mixer(7I), streamio(7I)
AMD-8111 HyperTransport I/O Hub Data Sheet — Advanced Micro Devices
Inc.
ALC655 Specification — Realtek Inc.
http://www.sun.com/io
DIAGNOSTICS
In addition to being logged, the following messages may appear on the
system console:
init_state() play interrupt rate set too low
The play interrupt rate in audio810.conf is set too low. It has
been reset to the rate specified in the message. Update
audio810.conf to a higher play interrupt rate.
init_state() play interrupt rate set too high
The play interrupt rate set in audio810.conf is set too high. It
has been reset to the rate specified in the message. Update
audio810.conf to a lower play interrupt rate.
init_state() record interrupt rate set too low
The record interrupt rate in audio810.conf is set too low. It has
been reset to the rate specified in the message. Update
audio810.conf to a higher record interrupt rate.
init_state() record interrupt rate set too high
The record interrupt rate in audio810.conf is set too high. It has
been reset to the rate specified in the message. Update
audio810.conf to a lower record interrupt rate.
SunOS 5.10 16 July 2005 audio810(7D)