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The header on mine is just labelled audio. Retrieved from ” https: By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. I would suggest trying the HD audio connector first, if the rear audio output on your motherboard doesn’t work try using the AC97 connector instead. On HDA audio to the front and rear outputs comes from seperate outputs on the audio codec.

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This answers my question though, and gives me an idea what works. Sign up using Email and Password. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. It is recommended that you look at your motherboard manual. By using this site, you agree to the Terms of Use and Privacy Policy.

Wikimedia Commons has media related to AC’ The pins that were previously used to loop back audio from the front are repurposed as connector-detect pins. Slots 1, 2 and 12 are used for non-audio data, while slots 3—11 carry acc97 to nine channels of raw pulse-code modulation PCM audio signals. In particular the handling of plugging in of front panel devices is different.

Computer motherboards often provide a connector to bring microphone and headphone signals to the computer’s front panel with standard color jack. The cable looks somewhat like thiswith the AC 97 connector attached to the HD audio connector.


In other projects Wikimedia Commons. In my case the sound chip is a ALC but i’m more interested in a generic, all purpose answer, rather than one specific to this. The correct one to use depends on your case. Adding this as a comment in case someone comes across it. If you plug an AC97 front panel into a HDA motherboard then plugin detection will not work correctly, it may detect devices as not present when they are present and vice-versa and the exact results may depend on zlc audio is playing.

They are usually small square chips with 48 pins pin QFP package. The header on mine is just labelled audio. It is up to software whether to disable the rear panel audio output when a connector is plugged into the front panel output.

This is therefore a time-division multiplexing TDM scheme. While the connectors may look identical, the pinouts are different and not really interchangeable.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. So if you plug a HDA front panel into an AC97 motherboard you will get no output on the rear audio output. They both appear to have the same kind of connector right down to the ‘key’ – the space where there’s no pin and its filled upapparently the same colour codes aac97 close inspection and so on.

AC97 is supported by most operating systems, such as Windows and Linux.


On some motherboards it may be possible wc97 disable the plug-in detection so they can work better though still not perfectly with an AC97 front panel. The standard was used in motherboardsmodemsand sound cards.

Home Questions Tags Users Unanswered. On the other hand HD audio cables have a wire and terminal connecttor lurking there, waiting aoc in that cold dark hole poised and ready for the time when a naive unsuspecting pin 4 who isn’t even old enough to leave his motherboard ac7 into the High Definition Audio clutches of that extra wire.

HD Audio is generally more capable. Super User works best with JavaScript enabled. Codec chips have an AC97 interface on one side and analog audio interface on the other.

Download Realtek AC’97 Drivers – MajorGeeks

Intel provides a specification for that header; the signal assignments are different for AC’97 and Intel High Definition Audio headers. Incase your case only has HD connector but your board only has AC AC’97 defines a high-quality, or bit audio architecture with 5. The first slot 0 is 16 bits long and contains validity flags for the remaining slots, while the remaining bits are divided in twelve bit a97 slots 1—12used as data slots.