The Intel High Definition Audio Specification describes an
architecture and infrastructure to support high quality audio
implementations for PCs. The Specification defines the register-level
interface, physical link characteristics, and codec programming model as
well as codec architectural components. This specification is intended
for hardware component designers, system builders and device driver
Implementation of the High Definition Audio Specification requires a
license from Intel. Contributors to the High Definition Audio
Specification have signed the High Definition Audio (“Azalia”)
Developers Agreement and have provided input to the specification under
the terms outlined in that agreement. Implementers that have signed the
High Definition Audio Specification (“Azalia”) Adopter Agreement are
licensed to produce products based on the specification under a
reciprocal, royalty-free license to certain intellectual property rights
from Intel and other Contributors and Adopters for their products that
are compliant with the licensed versions of the High Definition Audio
Intel intends to continue including suitable inputs, comments and
suggestions from Contributors to refine and update the High Definition
Audio Specification through a series of specification releases that will
be marked as being Revision 1.x of the specification.
The latest revision of the specification is Revision 1.0.
Subsequent Revision 1.x levels of the specification will be completed by
Intel at its discretion as time and circumstances permit.