Audio Codec '97 (AC'97) is the specification for high-quality, 20-bit audio architecture used in many desktop PCs. The spec was developed in the old Intel Architecture Labs in 1997 to provide system developers with a standardized specification for integrated PC audio devices. AC'97 defined a high-quality audio architecture for the PC and is capable of delivering up to 96kHz/20-bit playback in stereo and 48kHz/20-bit in multichannel playback modes.

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In 2004, Intel released a new spec, Intel® High Definition Audio (Intel® HD Audio), which is capable of up to 192kHz/32-bit playback in multichannel mode. Intel worked with the industry to develop the new spec, which is capable of delivering the features and high-end performance of an add-in audio card. Intel HD Audio is capable of playing back more channels at higher quality than previous integrated audio formats. In addition, Intel High Definition Audio has the technology needed to support the latest and greatest audio content.