References

The current API spec has no references to any outside audio standards
documents.
But the down-mixing seems to be based on ITU-R BS.775 Annex 4.
This should be listed as a normative reference.

(But note that the up-mix from mono to stereo and quad is inconsistent with
ITU-R BS.775)

Much of the API is inspired by or based on OpenAL.
The OpenAL API should be listed as an informative reference.

The IRCAM HRTF database should be listed as either an informative or
normative reference, depending on the final decision of its use.

In addition, some sort of reference to a text or paper on spatial hearing
should be listed as an informative reference to justify and explain the
HRTF panner.

Some sort of physics reference should be given for Doppler shifts and the
default speed of sound.

RBJ's EQ cookbook is referenced in the document, but is not listed in the
references.
I would supplement that with a reference that includes a bibliography, such
as
"Digital Audio Signal Processing" by Udo Zölzer, which covers the same
standard EQ shapes.
.
Sincerely,
   Frederick