---
name: "audioce"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/audioce"
---

# audioce(4)

SPARC64 EBus CS4231 audio device

## 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)](/audio/4.md). 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)](/audio/4.md) 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.

## SEE ALSO

[ioctl(2)](/ioctl/2.md), [audio(4)](/audio/4.md), [ebus(4)](/ebus/4.md), [intro(4)](/intro/4.md)

## HISTORY

OpenBSD support for **audioce** first appeared in OpenBSD 3.0.