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CMPCI(4)                 BSD Kernel Interfaces 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:

           o   Supports 8 common sample rates from 5512 Hz to 48000 Hz

           o   Hardware full-duplex support enables simultaneous record and
               playback

           o   Some CMI8738 versions support 4 and 6 channel playback

           o   CMI8768 chips support 4, 6, and 8 channel playback

           o   CMI8768 chips can only record sample rates of 44100 Hz or 48000
               Hz

           o   Hardware copying of front to rear for playing stereo input on 4
               speakers

           o   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.

BSD                              July 31, 2010                             BSD