- Ensoniq 1371/1373 and Creative Labs 5880 driver support
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.
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
Line Out: Yes
Int. Speaker: Yes
Line In: Yes
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.
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.
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)).
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.
Errors are defined in the audio(7I) man page.
Symbolic link to the system's primary audio device. (Not necessarily an audioens audio device).
Control device for the primary audio device.
Represents the first audio device on the system. (Not necessarily an audioens audio device).
Audio control for /dev/sound/0.
Audio sample files.
32-bit audioens driver
Audioens driver configuration file
See attributes(5) for descriptions of the following attributes:
Creative Technology Ltd ES1371 Specification
Creative Technology Ltd ES1373 Specification
Creative Technology Ltd CT5880 Specification
In addition to being logged, the following messages may appear on the system console.
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.
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.
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.
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.