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+.\"     $OpenBSD: audioce.4,v 1.9 2020/05/17 05:48:39 ratchov Exp $
+.\"
+.\" Copyright (c) 2001 Jason L. Wright (jason@thought.net)
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+.\" DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd $Mdocdate: May 17 2020 $
+.Dt AUDIOCE 4 sparc64
+.Os
+.Sh NAME
+.Nm audioce
+.Nd SPARC64 EBus CS4231 audio device
+.Sh SYNOPSIS
+.Cd "audioce* at ebus?"
+.Cd "audio* at audioce?"
+.Sh DESCRIPTION
+The
+.Nm
+device uses the
+.Tn Crystal Semiconductor
+CS4231A
+Parallel Interface, Multimedia Audio Codec
+chip to implement the audio device interface described in
+.Xr audio 4 .
+This device is found onboard on some PCI/EBus based sparc64 models.
+.Pp
+The
+.Nm
+has a maximum precision of 16 bits and has both stereo and monoaural outputs.
+.Sh MIXER INTERFACE
+The
+.Xr audio 4
+interface for
+.Nm
+provides the following controls:
+.Bl -tag -width "outputs.monitor.mute"
+.It Cm outputs.dac
+Specifies the attenuation of DAC output.
+A value of
+.Ql 255
+represents 0 dB attenuation.
+.It Cm outputs.dac.mute
+Specifies whether DAC output is muted.
+.It Cm outputs.output
+Specifies the set of enabled output ports.
+The output ports are:
+.Ql line ,
+the line output jack,
+.Ql hp ,
+the low impedance headphone jack, and
+.Ql spkr ,
+the internal speaker.
+Note: Not all systems support disabling the headphone and line output ports.
+.It Cm inputs.cd
+Specifies the gain applied to CD audio input.
+A value of
+.Ql 191
+represents 0 dB.
+.It Cm inputs.cd.mute
+Specifies whether CD audio input is muted.
+.It Cm inputs.line
+Specifies the gain applied to line input.
+A value of
+.Ql 191
+represents 0 dB.
+.It Cm inputs.line.mute
+Specifies whether line input is muted.
+.It Cm outputs.monitor
+Specifies the attenuation of ADC to DAC output.
+A value of
+.Ql 255
+represents 0 dB.
+.It Cm outputs.monitor.mute
+Specifies whether ADC to DAC output is muted.
+.It Cm record.volume
+Specifies ADC input gain.
+A value of
+.Ql 0
+represents 0 dB.
+.It Cm record.source
+Specifies the active input port for the ADC.
+The following are valid ADC input ports:
+.Ql line ,
+line input,
+.Ql cd ,
+CD input,
+.Ql mic ,
+microphone input, and
+.Ql mixerout ,
+post-mixer output as heard on the output ports.
+.It Cm record.mic_preamp
+Specifies whether an additional +20 dB gain is
+applied to the ADC's microphone input.
+.El
+.Sh SEE ALSO
+.Xr ioctl 2 ,
+.Xr audio 4 ,
+.Xr ebus 4 ,
+.Xr intro 4
+.Sh HISTORY
+.Ox
+support for
+.Nm
+first appeared in
+.Ox 3.0 .