AUDIOCE(4) - Device Drivers Manual (sparc64) #

AUDIOCE(4) - Device Drivers Manual (sparc64)

NAME #

audioce - SPARC64 EBus CS4231 audio device

SYNOPSIS #

audioce* at ebus? audio* at audioce?

DESCRIPTION #

The audioce device uses the Crystal Semiconductor CS4231A Parallel Interface, Multimedia Audio Codec chip to implement the audio device interface described in audio(4). This device is found onboard on some PCI/EBus based sparc64 models.

The audioce has a maximum precision of 16 bits and has both stereo and monoaural outputs.

MIXER INTERFACE #

The audio(4) interface for audioce provides the following controls:

outputs.dac

Specifies the attenuation of DAC output. A value of ‘255’ represents 0 dB attenuation.

outputs.dac.mute

Specifies whether DAC output is muted.

outputs.output

Specifies the set of enabled output ports.
The output ports are:
'`line`',
the line output jack,
'`hp`',
the low impedance headphone jack, and
'`spkr`',
the internal speaker.
Note: Not all systems support disabling the headphone and line output ports.

inputs.cd

Specifies the gain applied to CD audio input.
A value of
'`191`'
represents 0 dB.

inputs.cd.mute

Specifies whether CD audio input is muted.

inputs.line

Specifies the gain applied to line input.
A value of
'`191`'
represents 0 dB.

inputs.line.mute

Specifies whether line input is muted.

outputs.monitor

Specifies the attenuation of ADC to DAC output.
A value of
'`255`'
represents 0 dB.

outputs.monitor.mute

Specifies whether ADC to DAC output is muted.

record.volume

Specifies ADC input gain.
A value of
'`0`'
represents 0 dB.

record.source

Specifies the active input port for the ADC.
The following are valid ADC input ports:
'`line`',
line input,
'`cd`',
CD input,
'`mic`',
microphone input, and
'`mixerout`',
post-mixer output as heard on the output ports.

record.mic_preamp

Specifies whether an additional +20 dB gain is
applied to the ADC's microphone input.

HISTORY #

OpenBSD support for audioce first appeared in OpenBSD 3.0.

OpenBSD 7.5 - May 17, 2020