NAME

       oss_cmpci - CMedia CMI8738/8768 audio driver.

DESCRIPTION

       Open Sound System driver for CMedia Electronics CMI8738/8768 audio

       CMI87xx device characteristics:

              •  8/16 bit playback/record

              •  mono/stereo/4ch/5.1ch playback

              •  8KHz to 48Khz sample rate.

   MIXER PANEL
       The  CMedia  chip  provides  some unique features that are set up by the Mixer chip. Running ossxmix will
       display the CMI8738 mixer panel.

       Most of the sliders and buttons are self evident. However there are some options that need explaining:

       Dual Dac: Enabling this button sets the CMPCI device as two separate output devices with /dev/dsp1  audio
       going  to  the  front  and /dev/dsp0 going to the rear outputs. Separate audio streams can be send to the
       device simultaneously.

       Speaker Mode: The audio can be sent just to the front speakers or it can be sent  simultaneously  to  all
       speakers in the "Spread" mode.

       AC3  passthrough  only  works  on Models 037 and higher. This is because of a hardware bug in the earlier
       models so check the model number (ossinfo -a).

       SPDIF:

       •  Enable will enable SPDIF output.

       •  Rec will allow you to record from the SPDIF device. Note that when you have SPDIF  recording  enabled,
          you cannot play 4/6 channel audio.

       •  Polarity - certain models require you to flip the bit otherwise you get distorted audio.

       •  IMon - monitor input via SPDIF in.

       •  Optical - sets the SPDIF to Optical (TOSLINK) or RCA Jacks interface.

OPTIONS

       None

FILES

       /etc/oss4/conf/oss_cmpci.conf Device configuration file

AUTHOR

       4Front Technologies

                                                03 December 2013                                    oss_cmpci(7)