audioens(7D) Devices audioens(7D)NAMEaudioens - Ensoniq 1371/1373 and Creative Labs 5880 driver support
DESCRIPTION
The audioens driver provides support for the Ensoniq 1371/1373 and Cre‐
ative Labs 5880 audio controllers. Ensoniq 1371/1373 and Creative Labs
5880 chips are found on add-in PCI cards commonly identified as Audio
PCI, CT4740, CT4810, CT5803, CT5808, and ES1371, and on some IA mother‐
boards.
PROGRAM INTERFACE
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 audioens driver returns
the string SUNW,audioens in the name field of the audio_device struc‐
ture. The version field contains a letter (defined in the table below)
and the config field contains the string onboard1.
The driver works on Sun architectures that support PCI slots, including
Sparc and IA.
Different cards provide different input and output connectors and may
internally hardwire these connectors. SpeakerOut implies an internal
audio amplifier and LineOut implies the output is to go to an amplified
speaker. The audioens driver routes output data to both SpeakerOut and
LineOut. The audioens driver supports input selection from LineIn or
Microphone.
Platform Type: Sun4u/IA
Version: a
Line Out: Yes
Headphone: No
Int. Speaker: Yes
Line In: Yes
Microphone: Yes
CD-ROM: No
Audio Mixer Mode
The configuration file /kernel/drv/audioens.conf is used to configure
the audioens driver and determines whether the audio mixer is enabled
or disabled. See the mixer(7I) manual page for details. You can change
the audio mixer mode at any time using the sdtaudiocontrol(1) or mix‐
erctl(1) applications.
Audio Data Formats
The audioens audio device supports the audio data formats shown below.
When the audio mixer is disabled and the device is opened for simulta‐
neous play and record, the input and output data formats may differ.
Some sample rates are supported when the mixer is disabled (D) that
are not supported when the mixer is enabled (E), due to the overly high
computational overhead for sample rate conversion.
Supported data formats.
Sample Rate Encoding Precision Channels Mode
5510 Hz u-Law or A-Law 8 1 or 2 D only
6620 Hz u-Law or A-Law 8 1 or 2 D only
8000 Hz u-law or A-law 8 1 or 2 E and D
9600 Hz u-law or A-law 8 1 or 2 E and D
11025 Hz u-law or A-law 8 1 or 2 E and D
16000 Hz u-law or A-law 8 1 or 2 E and D
18900 Hz u-law or A-law 8 1 or 2 E and D
22050 Hz u-law or A-law 8 1 or 2 E and D
27420 Hz u-law or A-law 8 1 or 2 D only
32000 Hz u-law or A-law 8 1 or 2 E and D
33075 Hz u-law or A-law 8 1 or 2 E and D
37800 Hz u-law or A-law 8 1 or 2 E and D
44100 Hz u-law or A-law 8 1 or 2 E and D
48000 Hz u-law or A-law 8 1 or 2 E and D
5510 Hz linear 16 1 or 2 D only
6620 Hz linear 16 1 or 2 D only
8000 Hz linear 16 1 or 2 E and D
9600 Hz linear 16 1 or 2 E and D
11025 Hz linear 16 1 or 2 E and D
16000 Hz linear 16 1 or 2 E and D
18900 Hz linear 16 1 or 2 E and D
22050 Hz linear 16 1 or 2 E and D
27420 Hz linear 16 1 or 2 D only
32000 Hz linear 16 1 or 2 E and D
33075 Hz linear 16 1 or 2 E and D
37800 Hz linear 16 1 or 2 E and D
44100 Hz linear 16 1 or 2 E and D
48000 Hz linear 16 1 or 2 E and D
Sample Granularity
Because the audioens 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 audioens 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. (See audio(7I)).
Interrupt Rate
The driver determines how often play and record interrupts take place.
For playing audio, the driver 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. You tune the play and record interrupt rates using the
/kernel/drv/audioens.conf file.
Audio Status Change Notification
As described in the mixer(7I) and audio(7I) man pages, you can request
asynchronous notification of changes in the state of an audio device.
ERRORS
Errors are defined in the audio(7I) man page.
FILES
/dev/audio
Symbolic link to the system's primary audio device.
(Not necessarily an audioens 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 audioens audio device).
/dev/sound/0ctl
Audio control for /dev/sound/0.
/usr/share/audio/samples
Audio sample files.
/kernel/drv/audioens
32-bit audioens driver
/kernel/drv/audioens.conf
Audioens driver configuration file
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────────────┬──────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────────────┼──────────────────────────────┤
│Architecture │PCI-based systems │
├────────────────────────────┼──────────────────────────────┤
│Availability │SUNWaudd, SUNWauda │
└────────────────────────────┴──────────────────────────────┘
SEE ALSOmixerctl(1), sdtaudiocontrol(1), ioctl(2), attributes(5), audio(7I),
mixer(7I), streamio(7I)
Creative Technology Ltd ES1371 Specification
Creative Technology Ltd ES1373 Specification
Creative Technology Ltd CT5880 Specification
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 settoo low
The play interrupt rate specified in audioens.conf is set too low.
It has been reset to the rate specified in the message. Update
audioens.conf to a higher play interrupt rate.
init_state() play interrupt rate set too high
The play interrupt rate set in audioens.conf is set too high. It
has been reset to the rate specified in the message. Update
audioens.conf to a lower play interrupt rate.
init_state() record interrupt rate set too low
The record interrupt rate specified in audioens.conf is set too
low. It has been reset to the rate specified in the message. Update
audioens.conf to a higher record interrupt rate.
init_state() record interrupt rate set too high
The record interrupt rate specified in audioens.conf is set too
high. It is being reset to the rate specified in the message.
Update audioens.conf to a lower record interrupt rate.
SunOS 5.10 22 May 2003 audioens(7D)
