Another PCM vs Bitstream Question

[crackinhedz]

Originally Posted by aqupunk

So I notice a difference between linear pcm and bitstream. I feel linear pcm sounds better but at the same time I can't enjoy 7.1 with it. Is there any way around this or should I just accept it?

sorry the Onkyo 605 does not post process a PCM signal....

But 5.1 uncompressed is awesome anyways... the Onkyo can do 7.1 PCM, so just find titles that use all 7.1 (Lionsgate starting to use 7.1 PCM...and theres a few others)...but for 5.1 PCM thats all you will get. Which honestly, unless its discrete 7.1, all postprocessing is, is matrixing the surround channels...its not a real "back" channel, so youre not missing out on too much.

[aqupunk]

Originally Posted by crackinhedz

sorry the Onkyo 605 does not post process a PCM signal....

But 5.1 uncompressed is awesome anyways... the Onkyo can do 7.1 PCM, so just find titles that use all 7.1 (Lionsgate starting to use 7.1 PCM...and theres a few others)...but for 5.1 PCM thats all you will get. Which honestly, unless its discrete 7.1, all postprocessing is, is matrixing the surround channels...its not a real "back" channel, so youre not missing out on too much.

So on my bdp-s300 I should change all audio settings to pcm? Such as Dolby Digital, DTS? And what should I set the DTS Downmix to, Stereo or Lt/Rt?

[crackinhedz]

Originally Posted by aqupunk

So on my bdp-s300 I should change all audio settings to pcm? Such as Dolby Digital, DTS? And what should I set the DTS Downmix to, Stereo or Lt/Rt?

well...since the bdp-s300 cannot decode dolby trueHD...then you should be ok just setting bitstream. (or "auto", whatever is the choice)...

when you select the uncompressed PCM track it will automatically send linear pcm. But when you select dolby or dts it will bitstream so your reciever can decode and apply post processing (prologicIIx etc)


...as for "DTS downmix"...I would say turn it "off" (is that a choice?).

[aqupunk]

Originally Posted by crackinhedz

well...since the bdp-s300 cannot decode dolby trueHD...then you should be ok just setting bitstream. (or "auto", whatever is the choice)...

when you select the uncompressed PCM track it will automatically send linear pcm. But when you select dolby or dts it will bitstream so your reciever can decode and apply post processing (prologicIIx etc)


...as for "DTS downmix"...I would say turn it "off" (is that a choice?).

No it isn't a choice it is either DTS or downmix pcm.

So really auto sounds a little different then pcm. So what your saying is bitstream will be the same as just multichannel pcm, and it will post process prologicIIx, and that s the best I can do with my sony and onkyo 605.

[crackinhedz]

Originally Posted by aqupunk

No it isn't a choice it is either DTS or downmix pcm.

So really auto sounds a little different then pcm. So what your saying is bitstream will be the same as just multichannel pcm, and it will post process prologicIIx, and that s the best I can do with my sony and onkyo 605.

ok, im not sure about the DTS or downmix pcm...you just said earlier, "downmix dts"...

when I say set to "auto"...what this does is basically the same concept as bitstream, it will send standard dolby digital and dts to your reciever, and your reciever will decode. If you happen to slect the Uncompressed PCM track, it will send it as Linear PCM anyways.

Now, if you were to set to output as PCM instead of "auto" what would happen is the player will deocde internally into a pcm signal, and then send it to the reciever, and since your reciever cannot post process a pcm signal, you will be stuck with 5.1 dolby digital and dts. Now, set to "auto" it will send bitstream, which your reciever can then take the dolby digital and dts, decode it, and then post process it with pro logicIIx etc.

I know it doesnt make sense, just trust.


im gonna go read your manual. get back in a bit.

[crackinhedz]

ok,pg.47 in manual, for:

Dolby Digital -> Dolby Digital

DTS -> DTS

DTS downmix -> Lt/Rt

Audio (HDMI) -> Auto



("DTS downmix" is for if you set DTS->Downmix PCM...but since you set DTS->DTS, it shouldnt affect you)

[aqupunk]

Originally Posted by crackinhedz

ok,pg.47 in manual, for:

Dolby Digital -> Dolby Digital

DTS -> DTS

DTS downmix -> Lt/Rt

Audio (HDMI) -> Auto



("DTS downmix" is for if you set DTS->Downmix PCM...but since you set DTS->DTS, it shouldnt affect you)

Alright, thanks for your help I totally appreciate and I will stop messing with it and just enjoy it. Thanks again!

[mikebijt]

Originally Posted by crackinhedz

sorry the Onkyo 605 does not post process a PCM signal....

But 5.1 uncompressed is awesome anyways... the Onkyo can do 7.1 PCM, so just find titles that use all 7.1 (Lionsgate starting to use 7.1 PCM...and theres a few others)...but for 5.1 PCM thats all you will get. Which honestly, unless its discrete 7.1, all postprocessing is, is matrixing the surround channels...its not a real "back" channel, so youre not missing out on too much.

Hi. I'm a new Onkyo 605 owner. Can you tell me how I know that the PCM signal I receive is indeed a multi channel PCM signal and not a two channel signal? And what surround mode should I best use for listening to a 5.1 uncompressed PC signal (for example Prologic II or DTS Neo:6 or...)??

Thanks!