Content-type: text/html Man page of audioens

audioens

Section: Devices (7D)
Updated: 22 May 2003
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NAME

audioens - Ensoniq 1371/1373 and Creative Labs 5880 driver support  

DESCRIPTION

The audioens driver provides support for the Ensoniq 1371/1373 and Creative 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 motherboards.  

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 structure. 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 mixerctl(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 simultaneous 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 RateEncodingPrecisionChannelsMode
5510 Hzu-Law or A-Law81 or 2D only

 6620  Hz
u-Law or A-Law81 or 2D only
8000 Hzu-law or A-law81 or 2E and D
9600 Hzu-law or A-law81 or 2E and D
11025 Hzu-law or A-law81 or 2E and D
16000 Hzu-law or A-law81 or 2E and D
18900 Hzu-law or A-law81 or 2E and D
22050 Hzu-law or A-law81 or 2E and D
27420 Hzu-law or A-law81 or 2D only
32000 Hzu-law or A-law81 or 2E and D
33075 Hzu-law or A-law81 or 2E and D
37800 Hzu-law or A-law81 or 2E and D
44100 Hzu-law or A-law81 or 2E and D
48000 Hzu-law or A-law81 or 2E and D

 5510 Hz
linear161 or 2D only

 6620 Hz
linear161 or 2D only

 8000 Hz
linear161 or 2E and D

 9600 Hz
linear161 or 2E and D
11025 Hzlinear161 or 2E and D
16000 Hzlinear161 or 2E and D
18900 Hzlinear161 or 2E and D
22050 Hzlinear161 or 2E and D
27420 Hzlinear161 or 2 D only
32000 Hzlinear161 or 2E and D
33075 Hzlinear161 or 2E and D
37800 Hzlinear161 or 2E and D

 44100 Hz
linear161 or 2E and D

 48000 Hz
linear161 or 2E 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 recording 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 TYPEATTRIBUTE VALUE
ArchitecturePCI-based systems
AvailabilitySUNWaudd, SUNWauda

 

SEE ALSO

mixerctl(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.


 

Index

NAME
DESCRIPTION
PROGRAM INTERFACE
Driver Versions
Audio Mixer Mode
Audio Data Formats
Sample Granularity
Interrupt Rate
Audio Status Change Notification
ERRORS
FILES
ATTRIBUTES
SEE ALSO
DIAGNOSTICS

This document was created by man2html, using the manual pages.
Time: 02:40:00 GMT, October 02, 2010