Sample resolutions of 83. Sample rates of 61. Hz. Support for audio codecs e. ADC, DAC, modem codecs, and vendor defined codecs. Discoverable codec architecture. Fine grained codec power control. Audio jack detection, sensing, and retasking. However, as of 2. Operating system supporteditMicrosoft. Windows XP SP3 and later Windows versions3 include a Universal Audio Architecture UAA class driver which supports audio devices built to the HD Audio specification. There are UAA drivers for Windows 2. Keep your system uptodate and out of trouble. TechSpots library of driver downloads includes the latest graphics card drivers, printers, networking, audio, chipset. Microsoft Bus Driver For Hd Audio' title='Microsoft Bus Driver For Hd Audio' />Windows XP SP2 as well. OS has full support with its Apple. HDA driver. Linux also supports HD Audio controllers, as do the Open. Solaris,4Free. BSD,5Net. BSD and Open. BSD6 operating systems. Host controllereditLike AC9. 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. Implementations of the host controller are available from at least Intel, Nvidia, and AMD. Codecs which can be used with such controllers are available from many companies, including Realtek,8Conexant which bought out Analog Devices Sound. MAX division,9Integrated Device Technology IDT acquired from Sigma. Tel, VIA, Wolfson Microelectronics, and formerly C Media. Front panel connectoreditComputer motherboards often provide a connector to bring microphone and headphone signals to the computers front panel. Intel provides a specification for that header, but the signal assignments are different for AC9. HD Audio headers. The pin assignments for the AC9. HD Audio connectors are 1. Pin. AC9. 7HD Audio HDASignal. Description. Signal. Description. 1MICAudio, mono, in mic. Download Free Antivirus 2009 Full Version. Audio, left, in biased, mic. PORT 1. LAudio, left, port 1. AUDGNDGround. GNDGround. MIC BIASMicrophone bias. Audio, right, in biased, mic. PORT 1. RAudio, right, port 1. AUDGNDGround. PRESENCEHDA dongleconnector detection, active low. FPOUTRAudio out, right, out headphone level capable, front panel. PORT 2. RAudio, right, port 2. FPRETURNRAudio, right, return when jack is unconnected, front panel. SENSE1RETURNPort 1 jack detection. AUD5. VPower, 5 VSENSESENDJack detection sense, resistance multiplexed. KEYNot present, physical key. KEYNot present, physical key. FPOUTLAudio, left, out headphone level capable, front panel. PORT 2. LAudio, left, port 2. FPRETURNLAudio, left, return when jack is unconnected, front panel. SENSE2RETURNPort 2 jack detection. The HDA 3. 5 mm subminiature audio connectors differ from connectors used in AC9. A regular 3. 5 mm audio jack which is used in AC9. When there is no plug in the jack, the two stereo signals are connected to their return pins. When a plug is inserted, the stereo signals contact the respective channels on the plug and are disconnected from the jacks return pins. In the AC9. 7 design, the audio output is sent to the jack. If the headphones are not plugged in, the jack directs the audio to the return pins that are connected to the speakers. 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. For the microphone jack, the return signal pins ground the microphone input when the microphone is not plugged in. Many motherboards with AC9. The HDA 3. 5 mm jack is slightly different it does not have the two return audio signals instead it has an isolated switch that senses the presence of a plug in the jack. When the plug is inserted, the isolated switch informs the motherboard, and the codec sends audio to the headphones. 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. A similar isolated switch is used to detect when a microphone has been plugged in. HD Audio can sense the presence of an audio dongle. A 1. 0 k pull up resistor is attached to pin 4 PRESENCE. When the HDA dongle is plugged in, it pulls pin 4 to ground with a 1 k resistor. The motherboard can determine if the dongle is plugged in by examining the logic level on pin 4. If the motherboard does not detect the presence of an HDA dongle, then it should ignore SENSE1RETURN pin 6 and SENSE2RETURN pin 1. In AC9. 7, pins 2 and 4 are audio ground, but pin 4 is often disconnected. Consequently, an HDA motherboard would not detect the presence of an AC9. Intel warns that HDA dongles should be used with HDA motherboards 1. 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. Passive AC9. 7 analog front panel dongles ones which leave the 5. V Analog pin 7 line unconnected on the dongle may be used with the Intel HD Audio analog front panel header. But note that the front panel jack detection and re tasking functionality will be lost as the AC9. SENSE line. In addition, software must be aware that an AC9. Intel HD Audio analog header since the software might need to dedicate codec ports that are connected to the header to meet the products intended functionality. The different signal assignments can cause trouble when AC9. HDA motherboards and vice versa. An AC9. 7 dongle returns audio on pins 6 and 1. Consequently, a loud audio passage may make the HDA motherboard with AC9. An AC9. 7 motherboard with an HDA dongle will route the AC9. V audio supply pin 7 silence to the speakers instead of the desired left and right audio signals. To avoid this, some motherboards allow choosing between HDA and AC9. BIOS. Even though the actual audio hardware is HD Audio, it will allow using the AC9. Likewise, some modern enclosures have both an AC9. HDA plug at the end of the front panel audio cable. ReferenceseditSmith, Tony 1. April 2. 00. 4. Intel completes hi def audio spec. The Register. Situation Publishing Limited. Retrieved 1. 4 January 2. High Definition Audio Specification 1. PDF. Intel Corporation. Microsoft Knowledge Base Article 8. Open. Solaris Boomer Project Pagepermanent dead link, 2. Man. freebsd. org 2. Retrieved on 2. 01. Manual Pages azalia. Openbsd. org 2. 01. Retrieved on 2. 01. AMD SB6. 00 Product Information Page, 2. ALC8. 88 Product Page, 2. Conexant PC HD Audio. Archived 2. 01. 3 0. Wayback Machine. ab. Intel Corporation February 2. Front Panel IO Connectivity Design GuidePDF, Version 1. Intel Corporation 2. Intel Corporation 2. Intel Corporation 2. Intel Corporation 2. Intel Corporation 2. External linksedit.