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

# oss\_hdaudio(7)

Intel High Definition Audio (AZALIA)

## 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:**

- **o Orange = Center/LFE**

  **o Blue = Line-in**

- **o Black = Rear**

  **o Green = Front**

- **o Grey = Side**

  **o 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)](/ossmix/1.md))**  **for "generic" systems is very cryptic and difficult to** **understand. To solve problems with volumes or signal routing you need to** **start [ossxmix(1)](/ossxmix/1.md) and change the controls one at time until you get the desired** **effect.**

## OPTIONS

- **o 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.**

- **o 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**