[quote user="Tom Parsons"]Thank you for the very useful and informative post Eiren - you are certainly spot-on with the PS3's audio capabilities. However, our argument for the inclusion of HD audio decoding onboard AV receivers still stands, as the majority of them do a better job of decoding than the PS3 (or other current Blu-ray player). However, it's certainly true that you will be able to take advantage of HD audio using your Audiolab 8000 - I'll be doing the same with my aging Denon![/quote]Hi Tom,
Should What HiFi though be using what I assume is some influence with HiFi manufacturers to actually address what is the real issue, i.e. poor handling of PCM over HDMI in receivers?
The reason I say this is because bitstream decoding would seem to be something of a blind alley. Currently 99.9% (or therabouts!) of Blu-ray discs do not include any Bonus View or BD-Live picture in picture capabilities so all these discs play fine when using HD bitstream to an amplifier. However, should such discs become more widespread as studios get familiar with the authoring, or someone invents a must have use for such extras, won't your letters pages be filled with people who've followed the bitstream advice complaining that they get no audio for this?
I'm not doubting that you and others are indeed hearing better results when a receiver does the decoding from an HD bitstream, however, this is more likely to be because everything is being done in one place and therefore the digital signal management is better, which more specifically means control of clocking is better handled.
Going forwards, the only way Blu-ray will work properly with full functionality and full quality is with in-player decoding. That way you have access to all the features in the best quality. The fact that currently bitstream sounds better would be better used to tell the manufacturers to sort PCM audio over HDMI out. Perhaps it's the receivers that should be getting marks knocked off for poor PCM over HDMI performance unless you can show that poor jitter on the source signal is responsible for the poorer performance?
If we (av community and hifi mags) don't get this message through, then we're faced with the prospect of IF we want to explore PiP extras or such like by simply pressing a button, we're instead going to have to stop the movie, change player settings to turn off bitstream, start movie, skip to where we were because no interactive titles support resume play, then press the button... watch the PiP extra, go through the whole mess again to turn bitstream back on and go back to full quality audio. It's hardly seamless interactivity is it?
Bitstreaming is IMHO just a kludge to bypass sorting out the real problem. Extra quality alone will not be enough to sell Blu-ray (or HD-DVD if it were still with us) to a wider audience. Enhanced interactivity is also going to play a part and the AV community may be inadvertently cutting itself off from that with bitstream audio.