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Intel High Definition Audio (IHDA) (also called HD Audio or development codename Azalia) is a specification for the audio sub-system of personal computers. It was released by Intel in 2004 as the successor to their AC'97 PC audio standard.
Three classes of audio devices are supported by default: USB, IEEE 1394 , and Intel High Definition Audio, which supports PCI and PCI Express. Starting with Windows Vista, Microsoft requires all computer and audio device manufacturers to support Universal Audio Architecture in order to pass Windows Logo certification.
High-resolution audio (high-definition audio or HD audio) is a term for audio files with greater than 44.1 kHz sample rate or higher than 16-bit audio bit depth. It commonly refers to 96 or 192 kHz sample rates. However, 44.1 kHz/24-bit, 48 kHz/24-bit and 88.2 kHz/24-bit recordings also exist that are labeled HD audio.
ALS 100 Audio Chip. Avance Logic, Inc. was a hardware manufacturer founded in 1991 in Fremont, California, and was most recently headquartered in San Jose, California. Avance Logic focused particularly on the development of low-cost, highly integrated electronic components for OEM manufacturers and was active in the areas of 2D graphics and ...
ISA-8 bus. Sound card Mozart 16 for ISA-16 bus A Turtle Beach sound card for PCI bus Echo Digital Audio's Indigo IO – PCMCIA card-bit 96 kHz stereo in/out sound card A VIA Technologies Envy sound card for PC, 5.1 channel for PCI slot. Sound cards for IBM PC–compatible computers were very uncommon until 1988.
In 2004, Intel released Intel High Definition Audio (HD Audio) which is a successor that is not backward compatible with AC'97. [2] HD Audio has the capability to define up to 15 output channels, but in practice most motherboards provide no more than 8 channels ( 7.1 surround sound ).
Windows Sound System (WSS) is a sound card specification developed by Microsoft, released at the end of 1992 for Windows 3.1. It was sold as a bundle which included an ISA sound card, a microphone , a pair of headphones and a software package.
In audio engineering, a bus [1] (alternate spelling buss, plural busses) is a signal path that can be used to combine (sum) individual audio signal paths together.It is typically used to group several individual audio tracks which can be then manipulated, as a group, like another track.