Computer motherboards often provide a connector to bring microphone and headphone signals to the computer’s front panel. The wordmarks, service marks, trademarks and associated tag lines used within this site are the exclusive property of Cmedia Electronics Inc. Furthermore, it has an embedded microprocessor that can enhance the best flexibility and functionality with external upgradeable Flash codes. Views Read Edit View history. Our turnkey solutions include audio class 2. If, however, you prefer not to enable cookies, please go to www. When a headphone is plugged into the front panel jack, the audio signal goes to the headphones; the return pins are disconnected, so no audio signal goes to the speakers.

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For the microphone jack, the return signal pins ground the microphone input when the microphone is not plugged in. Why do we collect your personal alc/c,i Please note that certain features of the Cmedia website will not be available once cookies are disabled.

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Pixel tags also enable us to send email messages in a format customers can read. We dodec you to learn about the privacy policies of those companies. Retrieved 14 January Cmedia takes your privacy very seriously. Cmedia takes precautions, including administrative, technical, and physical measures, to safeguard your personal information against loss, theft, and misuse, as well as unauthorized access, disclosure, alteration, and destruction.

If the headphones are not plugged in, the jack directs the audio to the return pins that are connected to the speakers.

When the plug is inserted, the isolated switch inside the jack informs the motherboard, and the codec sends audio to the headphones. We alc/ccmi not knowingly solicit personal information from minors or send them requests for ccodec information. HD Audio can sense the presence of an audio dongle. We store all of this information in a secure database located in Canada. This policy last updated 16 March As is true of most web sites, we gather certain information automatically and store it in log files.


Even though the actual audio hardware is HD Audio, it will allow using the AC’97 front panel that way.

In addition we use pixel tags tiny graphic images to tell us what parts of our website customers have visited or to measure the effectiveness of searches customers perform on our site.

This website and its contents are c Copyright Cmedia Electronics Inc.

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We track this click-through data to help us determine interest in particular topics and measure the effectiveness of our customer communications. We may also disclose information about you if we determine that for national security, law enforcement, or other issues of public importance, disclosure is necessary. Change your passwords often using a combination of letters and numbers, and keep them confidential. If you are sharing a computer with anyone, you should always choose to log out before leaving a site or service to protect access to your information from subsequent users.

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The different signal assignments can cause trouble when AC’97 front-panel dongles are used with HDA motherboards and vice versa. Likewise, some modern enclosures have both an “AC’97” and an “HDA” plug at the end of the front-panel audio cable. Any unauthorized use of the content of the website by any other party will violate various copyright laws, trademark laws, the laws of privacy and publicity, and civil and criminal statutes.

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The content of this website is meant for the sole purpose of providing information about Cmedia products.

For example, knowing your email address allows us to send you informative newsletters and driver information, and generally helps us provide a more useful online experience.

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Cmedia has safeguards in place to keep your personal information accurate, complete, and up to date for the purposes for which it is used.

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At times we may be required by law or litigation to disclose your personal information. To make sure your personal information is secure, we communicate these guidelines to Cmedia employees and strictly enforce privacy safeguards within the company. If you use a bulletin board or chat room on a Cmedia website you should be aware that any information you share is visible to other users.

The motherboard can determine if the dongle is plugged in by examining the logic level on pin 4.