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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.
Sound chips come in different forms and use a variety of techniques to generate audio signals. This is a list of sound chips that were produced by a certain company or manufacturer, categorized by the sound generation of the chips.
HD Audio support in the 1xx3 improved through the chipset's life with several revisions. The DD and CC versions of the chipset both added full 7.1 HD-audio support to the chipset. The 1073 players all built on a common SDK (firmware+OS) provided by Realtek. This meant that they were all essentially similar in performance and interface.
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).
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.
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.
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.