NAME

       oss_ich - Intel ICH/SiS7012/Nvidia/AMD audio device driver.

DESCRIPTION

       Open Sound System driver for Intel ICH, nVidia Nforce, AMD and SiS 7012 devices.

OPTIONS

       •  intelpci_rate_tuning=<NNN>  (default  is  240) Some Compaq Deskpro models (EN and EX at
          least) and certain Dell models play and record audio at a higher  speed  than  what  is
          expected.  If  you  have an Intel815 motherboard with an AD1885 you can try setting the
          parameter to 240, 280 or 330 and see which works for your system. The way to figure out
          the  the right intelpci_rate_tuning value is using the osstest application.  It reports
          a sample rate drift value ("Sample rate drift" or "srate drift").   Use  the  following
          formula (round the result to the nearest integer):

          <intelpci_rate_tuning = (240*(drift+100))/100>

       •  intelpci_force_mmio=<0|1>  (default  is 0=Disable) This option can be used to force the
          ICH4/ICH5 and ICH6 controllers to run in memory mapped mode  to  free  up  I/O  address
          space.

       •  ich_jacksense=<0|1> (default is 0) Force use of jacksensing on some AD198x mixers.

FILES

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

AUTHOR

       4Front Technologies

                                         17 January 2023                               oss_ich(7)