NAME

       oss_hdaudio - Intel High Definition Audio (AZALIA)

DESCRIPTION

       Open  Sound  System driver for Intels high definition audio known as "Azalia". This driver
       supports Intel 915/925 chipsets with the Realtek ALC880 and CMedia 9880 8 channel codecs.

       The HDA driver supports:

              •  8-96Khz Playback/Recording

              •  8 or 16 or 32 bits

              •  2, 4, 6 or 8 channel audio.

              •  SPDIF digital output and Input

              •  AC3 passthrough

       HDAUDIO MIXER The Intel HDA mixer is a new type of mixer  that  doesn't  have  the  normal
       volume  controls  found on AC97 or legacy SB devices.  The HDA mixer presents a concept of
       Jacks and you can configure any jack to be either an output or an input jack.

       Some motherboards may not correctly initialize the jacks  according  to  their  color  and
       functionality but in general here's the configuration that should generally be followed:

              •  Orange = Center/LFE

              •  Blue = Line-in

              •  Black = Rear

              •  Green = Front

              •  Grey = Side

              •  Pink = Mic

       Some  Azalia  codecs support front panel connectors and so if you see fp-green and fp-pink
       connectors, then these are for front panel speaker and mic/line-in Jacks.

       There  is  a  function  selector  for  most  of  the  analog  audio  jacks  (for   example
       connector.pink.mode).  This  selector  is  used to control if the jack is used as an input
       (microphone or line in) or output (front, rear, side, speaker, etc).

KNOWN PROBLEMS

       In general Azalia based systems (laptops/motherboards) would require a  custom  driver  to
       work  properly.  Due to enormous number of different systems it is not possible to develop
       such custom drivers for all systems. A generic driver is used for systems that don't  have
       dedicated drivers.

       Unfortunately  the mixer and control panel interface (see ossmix(1)) for "generic" systems
       is very cryptic and difficult to understand. To solve  problems  with  volumes  or  signal
       routing you need to start ossxmix(1) and change the controls one at time until you get the
       desired effect.

OPTIONS

       •  hdaudio_jacksense enables jack sensing mode when the hdaudio driver is loaded. In  this
          mode  all  I/O pin's that are not in use will be disabled as well as the mixer controls
          that are related with them. In this  way  the  mixer/control  panel  will  become  more
          intuitive.  However OSS will need to be restarted with soundoff; soundon every time new
          inputs or outputs are attached to the audio jacks. Default : 0.

          NOTE! hdaudio_jacksense=1 works only in some systems.  Many  laptops  and  motherboards
          don't support jack sensing.

       •  hdaudio_noskip  Disable  skipping  unconnected  jack. All mixer controls will be shown,
          even for disabled I/O pins.  Can get values 0-7. 1-7 is  a  bitmask,  where  every  bit
          masks a different check. Bit 3 (= value 4) overrides jacksense check too.  Default: 0 -
          unconnected jacks are skipped.

FILES

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

AUTHOR

       4Front Technologies

                                         11 February 2015                          oss_hdaudio(7)