Since you’ve already submitted a review for this product, this submission will be added as an update to your original review. Not present, physical key. Features of the specification include: Select type of offense: It is strongly recommended that motherboard designers only use Intel HD Audio analog front panel dongles with the Intel HD Audio analog front panel header to insure that the jack detection and dynamic re-tasking capability is preserved.

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An AC’97 dongle returns audio on pins 6 and 10 rather than a digital plug sensing signals. If the headphones are not plugged in, the jack directs the audio to the return pins that are connected to the speakers.

By using this site, you agree to the Terms of Use and Privacy Policy. In the AC’97 design, the audio output is always sent to the jack. The different signal assignments can cause trouble when AC’97 front-panel dongles are used with HDA motherboards and vice versa.

Consequently, an HDA motherboard would not detect the presence of an AC’97 dongle with a disconnected pin 4. Like AC’97, HD Audio is a specification that defines the architecture, link frame format, and programming interfaces used by the controller on the PCI bus and by the codec on the other side of the link.


Intel High Definition Audio also called HD Audio or development codename Azalia is a specification for the audio sub-system of personal computers. Even though the actual audio hardware is HD Audio, it will allow using the AC’97 front panel that way.

A similar isolated switch is used to detect when a microphone has been plugged in.

Intel High Definition Audio

Once reported, our staff will be notified and the comment will be reviewed. If you believe this comment is offensive or violates the CNET’s Site Terms of Useyou can report it below this will not automatically remove the comment. HD Audio can sense the presence of an audio dongle. In AC’97, pins 2 and 4 are audio ground, but pin 4 is often disconnected.

Intel provides a specification for that header, but the signal assignments are different for AC’97 and HD Audio headers. When the plug is inserted, the isolated switch inside the jack informs the motherboard, and the codec sends audio to the headphones. Sexually explicit or offensive language.

List of digital television deployments by country. Technical and de facto standards for wired computer buses.

Click here to review our site terms of use. When a headphone is plugged into the front panel jack, the audio signal goes to azalai headphones; the return pins are disconnected, so no audio signal goes to the speakers.


Likewise, some modern enclosures have both an “AC’97” and an “HDA” plug at the end of the front-panel audio cable. Flaming or offending other users.

Intel products Sound cards. Many motherboards with AC’97 audio need two jumpers to short the pins in case no front panel audio module is connected, so audio passes to the speakers. Thank You for Submitting Your Review,! This page was last edited on 13 Octoberat Features of the specification include: Retrieved 14 January Retrieved from ” https: Login or create an account to post a review.

Thank You for Submitting a Reply,! The posting of advertisements, profanity, or personal attacks is prohibited. In the HDA design, when the plug is not inserted, the codec sends the audio directly to the speakers the audio does not go out to the front panel and then loop back to the speakers.

Cmedia Azalia Audio Codec Driver – TechSpot

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