---
name: "oss_ich"
section: "7"
platform: "linux"
package: "oss4-base"
version: "4.2-build2010-2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/oss_ich"
---

# oss\_ich(7)

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

## 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**