I want to create an archive of high bitrate, uncompressed, four channel
recordings, with full access to the digital bitstream. If the Wikipedia
article, http://en.wikipedia.org/wiki/DVD-Audio , is correct, DVD-A is
unsuitable, because, even with the most permissive flags, digital output is
downconverted to 48K.

Does there exist any other quasi-standard that would permit the largest
number of other interested persons to easily play the material, with digital
access to the full bitrate? Are there any players that can handle multitrack
wav files? Copy protection is not an issue, as the audience would be very
restricted.