oss_cmi878x(7) [debian man page]

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)

oss_madi(7)							    OSS Devices 						       oss_madi(7)

NAME

       oss_madi - RME HDSP MADI and AES32 audio driver

DESCRIPTION

       Open Sound System driver for RME HDSP MADI and AES32 audio interfaces.

       This  driver has been developed for RME HDSP MADI but it also supports HDSP AES32. The driver has been tested under Linux and Solaris under
       x86 and Sparc.

       The internal engine of the card supports 64 playback channels and 64 recording channels. Only the  first  channels  are	connected  to  the
       actual input and output ports of the card.

       The  mixer  section  of the card has recording level settings for all inputs.  There is also an output mixer. Each output channel has mixer
       sliders for corresponding input channel and corresponding audio playback channel.

       There is a full 64x(64+64) mixing matrix supported by the hardware. For the time being this mixer matrix cannot be accessed directly by the
       applications. However support for the SNDCTL_MIX_MATRIX_WRITE and SNDCTL_MIX_MATRIX_READ ioctl calls can be added in the future.

DEVICE FILES

       By  default  the  driver will create input and output device files for each 32 stereo pairs. This can be changed by editing the settings in
       oss_madi.conf (see below).

       The application can set the devices to use 1, 2, 4, 8, 16, 32 or 64 channels.  The device file being used selects the  first  channel  slot
       within  the  available channels. For example pcm0 and pcmin0 sill select channel 0. Equally well pcm1 and pcmin1 will select channel slot 2
       (assuming that madi_devsize option is set to 2). The first device (pcm0 and pcmin0) can be set to use up to 64 channels. The  last  devices
       (pcm31 and pcmin31) only support 1 or 2 channel mode.  The other device files support channel configurations where the last channel doesn't
       exceed the number of total channels (madi_maxchannels). Also the driver will not let two device files to share any  of  the  channels  with
       some other open device file.

       This channel allocation mechanism gives maximum flexibility to the user. It is possible to use some output channels by multi channel appli-
       cation while the others are available for other applications. This works as long the channel allocations by  different  applications  don't
       overlap.

OPTIONS

       o madi_maxchannels
	      Number  of channels supported by the driver. The default is 64 which is also the maximum. This parameter can be set to a lower value
	      if full 64 channels are not required. With less channels the mixer/control panel interface will require less space on screen.

       o madi_devsize
	      By default this parameter is set to 2 which means that a device file will be created for each stereo channel pair.  Possible  values
	      are 1, 2, 4, 8, 16, 32 or 64.

LIMITATIONS

       o  The  current driver doesn't support all control panel features of the card.  For example sampling rate is fixed to 48 kHz. More features
	  will be added on contract.

       o  Use of mmap() is and will not be supported.

       o  Virtual mixer is not supported (yet).

FILES

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

AUTHOR

       4Front Technologies

								 16 December 2012						       oss_madi(7)