.\" $OpenBSD: cmpci.4,v 1.16 2010/07/31 08:33:20 ratchov Exp $
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.\" Copyright (c) 2000 Takuya SHIOZAKI
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.Dd $Mdocdate: July 31 2010 $
.Dt CMPCI 4
.Os
.Sh NAME
.Nm cmpci
.Nd C-Media CMI8338/CMI8738/CMI8768 PCI audio device
.Sh SYNOPSIS
.Cd "cmpci* at pci?"
.Cd "audio* at cmpci?"
.Sh DESCRIPTION
The
.Nm
driver supports the C-Media CMI8338A, CMI8338B, CMI8738, CMI8738B
and CMI8768 sound chips present in some PCI sound cards and some
integrated PC motherboard chipsets (such as the SiS 530).
.Pp
Hardware features:
.Bl -bullet -offset indent
.It
Supports 8 common sample rates from 5512 Hz to 48000 Hz
.It
Hardware full-duplex support enables simultaneous record and playback
.It
Some CMI8738 versions support 4 and 6 channel playback
.It
CMI8768 chips support 4, 6, and 8 channel playback
.It
CMI8768 chips can only record sample rates of 44100 Hz or 48000 Hz
.It
Hardware copying of front to rear for playing stereo input on 4 speakers
.It
S/PDIF input and output
.El
.Sh SEE ALSO
.Xr audio 4 ,
.Xr intro 4 ,
.Xr pci 4
.Sh HISTORY
The
.Nm
device driver appeared in
.Ox 2.7 .
.Sh BUGS
The Joystick port is not supported.