Uncompressed or Dolby Digital?

[jcs913]

Originally Posted by PeterTHX

No. It's decoding the TrueHD stream and outputting it as multichannel PCM. The PCM setting is only good if your receiver does not decode DD and DTS thru HDMI (some don't). There is a definate difference in sound when you hear it.



I have Legends of Jazz and Letters From Iwo Jima. My settings have always been bitstream and the TrueHD logo comes up if I select those tracks.

Another problem of setting it to PCM is that 6.1 DTS ES soundtracks (like X-MEN: The Last Stand) are decoded 5.1 by the PS3 and sent to a receiver as such. Also older receivers like my 803 Onkyo will not overlay THX Surround EX on multichannel PCM. I prefer it on as much as possible and with DD & DTS thru HDMI I still have that option.



Depends on what your receiver tells the PS3 it's capable of. My audio settings PS3 to Onkyo TX-SR803 via HDMI:

DD
DTS
AAC (PS3 decodes to PCM)
PCM 2 channel all options to 192kHz
PCM 5.1 channel options to 96kHz

Note there are no options for TrueHD or SACD. The PS3 is incapable of outputting them as anything but multichannel PCM due to its revision of the HDMI 1.3 chipset.

It is interesting, when you choose the bitstream option, the PS3 warns that you will miss some audio on some BD discs if you choose this. I think this was put in for this TrueHD discussion.

I have the same audio options checked as you, and my Elite 82 says DD main track on the TrueHD output through bitstream and I know it decodes all tracks. I put Ghost Rider back in to confirm, and again when it is bitstreaming the TrueHD track, my receiver just says DD. The PS3 menu screen says multi-channel and it has a 664 bit rate, which I know is not the decoded PCM of TrueHD. But when I choose LPCM on the TrueHD track, it says PCM and the bit rate is at the 2.0, like it is supposed to. It seems like a difference in designs from our receivers. A friend of mine has a Sony ES and his says the same DD core track when he bitstreams it out. But as expected, says PCM when he chooses LPCM.

You are correct on any of the DTS 6.1, you want bitstream as your choice, but of course, we are only talking about TrueHD. I wonder what the differences will be when the PS3 decodes DTS-HD. Hopefully, it will not continue to pull out the 1.5 core track. I understand some DTS-HD tracks get as high as 6MBPS. That should be interesting how it will send that track through PCM.

What does your receiver say when you bitstream the TrueHD tracks out? Multichannel PCM, or does it show the DD?