CMPCI(4) | Device Drivers Manual | CMPCI(4)

# NAME

`cmpci` — C-Media CMI8338/CMI8738/CMI8768 PCI audio device

# SYNOPSIS

`cmpci* at pci?`
`audio* at cmpci?`

# DESCRIPTION

The `cmpci` 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).

Hardware features:

- Supports 8 common sample rates from 5512 Hz to 48000 Hz
- Hardware full-duplex support enables simultaneous record and playback
- Some CMI8738 versions support 4 and 6 channel playback
- CMI8768 chips support 4, 6, and 8 channel playback
- CMI8768 chips can only record sample rates of 44100 Hz or 48000 Hz
- Hardware copying of front to rear for playing stereo input on 4 speakers
- S/PDIF input and output

# SEE ALSO

audio(4), intro(4), pci(4)

# HISTORY

The `cmpci` device driver appeared in OpenBSD 2.7.

# BUGS

The Joystick port is not supported.

July 31, 2010 | Debian