Provided by: oss4-base_4.2-build2005-2ubuntu1_i386
oss_ich - Intel ICH/SiS7012/Nvidia/AMD audio device driver.
Open Sound System driver for Intel ICH, nVidia Nforce, AMD and SiS 7012
· 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
Device configuration file.
05 February 2012 oss_ich(7)