In the past Meridian has always told me they would bring out audio codecs when there is sufficient material out on the market to play it.
They only time this was not true is with the 2+2+2 support. ButBob Stuart really liked that i heared somewhere.

So i assume if HD-DVD is coming out in Q4-2005 and all their 80 or so announced discs are having DD+ on them, Meridian might come out with a software update. (if possible with current DSP's)

But, the current SPDIF based MHR implementation will not be able to transport greater than 6 channels i think. So we would need a HDMI 1.1 or greater?input port.
HDMI 1.1 seems to be capable of 8 channel 24/96 uncompressed PCM and also
Quote
IEC 61937 compressed (e.g. surround-sound) stream at sample rates up to 192kHz.

We would also need a HD-DVD or Bluray player...

Jaco

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