NAME

       oss_cmi878x - CMedia CMI8788 audio driver.

DESCRIPTION

       Open Sound System driver for CMedia Electronics CMI8788 audio

       CMI87xx device characteristics:

              •  8/16/24/32 bit playback/record

              •  mono/stereo/4ch/5.1/7.1 playback

              •  8KHz to 192Khz sample rate.

       The  CMedia  8788  device  provides  3  types of devices. The first devices is a Multichannel full duplex
       device. The second device provides Front Panel audio access and the SPDIF device provide SPDIF  (Digital)
       audio I/O.

        MIXER PANEL
       The  CMedia  chip  provides  some  unique  features  that are set up by the Mixer chip. There are 3 mixer
       devices presented to the user.

       Main Mixer Panel (/dev/mixer0)

       •  Master Mixer panel is for controlling output volumes for each of the 8 channels.

       •  Monitor buttons will allow you to monitor the input from the Rear Panel inputs, Front Panel Inputs and
          SPDIF IN.

       •  Speaker-Spread function duplicates the front channel output on all 8 speakers.

       •  SPDIF Loopback simply takes SPDIF Input and Plays it out the SPDIF Output.  panel.

              AC97 Input Mixer Panel (/dev/mixer1) This mixer panel is used to switch between the various inputs
              like line-in, mic, cd. When the Rear Panel Monitor button is check marked in the Main mixer panel,
              the IGAIN slider in this panel controls the level of the input that can be hear on the speakers.

              AC97  Front  Panel  Mixer (/dev/mixer2) This mixer controls the front panel ac97 device. It can be
              used to control all the volumes and inputs as well as SPDIF output on the front panel device.

OPTIONS

       None

FILES

       /etc/oss4/conf/oss_cmi878x.conf
              Device configuration file.

AUTHOR

       4Front Technologies

                                                11 February 2015                                  oss_cmi878x(7)