The 1394 audio specifications were completed last year. Audio and Music Data Transmission Protocol version 2.1 is dated May 24, 2002. The 5C/DTCP compliance rules for 1394 audio was completed June 10, 2002. There is currently a Pioneer receiver and DVD player that handles DVD-A and SACD, that uses this standard digital interface. A Sony receiver and player using this standard digital interface is expected in a few months (it's from Sony so it supports SACD but probably not DVD-A however) and, even Denon recently announced products that use the standard interface (even though Denon previously used it's own proprietary digital interface).

So yes, there is a standard for DVD-A and different brands are following it to promote interoperability between the brands.

See the following thread for more up-to-date info: http://www.avsforum.com/avs-vb/show...0&pagenumber=10

Best,

Will