oss_cmi878x(7)							    OSS Devices 						    oss_cmi878x(7)

NAME

       oss_cmi878x - CMedia CMI8788 audio driver.

DESCRIPTION

       Open Sound System driver for CMedia Electronics CMI8788 audio

       CMI87xx device characteristics:

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

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

	      o  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)

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

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

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

       o  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

								 16 December 2012						    oss_cmi878x(7)