View Full Version : Audio Setting: 7.1 LPCM 192KHZ??????


etimmy22
02-27-08, 05:50 PM
This setting is found on the ps3 and probably other players. What is the use of these higher mhz settings? Is there games or movies recorded in these higher formats? Arent we limited to 48/96khz on movie discs

thehun
03-01-08, 06:36 PM
Yes, movie soundtracks are 24/48 in most cases. Some concerts might be recorded at 24/96.

scooterdog
03-01-08, 11:40 PM
FYI

3:10 To Yuma on BR has the 7.1 LPCM track.

sivadselim
03-02-08, 12:11 AM
2 channel DVD-A tracks can be 192kHz. Whether that has anything to do with that particular setting, I don't know. Perhaps the 192kHz indicates a maximum that that setting will allow with material that happens to be 2 channel, 192kHz material.

sivadselim
03-02-08, 12:12 AM
FYI

3:10 To Yuma on BR has the 7.1 LPCM track.Yes, but it's not @ 192kHz.

JuanPa
03-02-08, 01:21 AM
My Integra DTC 9.8 displays 172.4kHz when I feed it a SACD signal from the PS3. Now, I don't know if the SACD has that kind of sampling, or if the PS3 is upsampling. Also, since the signal comes in at such high resolution, the Audissey settings are deactivated automatically.... In any instance, it still sounds fantastic.

SiriuslyCold
03-02-08, 01:30 AM
What does the Integra do with the other 4kHz? :eek: ;)


the DSD signal is 1bit @ 2.88mHz it is being decimated to 24b / 176.4kHz; hence the question.

William
03-02-08, 07:50 AM
2 channel DVD-A tracks can be 192kHz...

PS3 doesn't play DVD-A.

SiriuslyCold
03-02-08, 09:29 AM
the mention of the PS3 in the original post is just as an example

This setting is found on the ps3 and probably other players.

scooterdog
03-02-08, 11:40 AM
[QUOTE=sivadselim;13269530]Yes, but it's not @ 192kHz.[/QUOTE

Thats correct

Sonic icons
03-02-08, 01:31 PM
According to the Wikipedia article on Dolby TrueHD (I find their articles on audio and video formats are usually well-referenced):

For both HD DVD and Blu-ray, TrueHD's capabilities are the same: the program may carry up to 8 discrete audio channels, at a sample depth & rate of 24-bit/96 kHz (Blu-Ray Disc format specification allows also for encoding up to 6 channels at 192 kHz).
http://en.wikipedia.org/wiki/Dolby_truehd

Therefore, future Blu-ray releases could have 5.1 channel 192 kHz soundtracks. Sony (and other manufacturers?) must have decided "let's include such a setting on our players for future-proofing, i.e. compatibility with discs that might be released in the future."

According to the article, 5.1 channel 192 kHz is compatible with the existing Blu-ray spec, 7.1 channel 192 kHz is "just beyond" the spec. Note also that the ps3 decodes Dolby TrueHD tracks to LPCM, but cannot transmit these tracks as bitstream, so it makes sense for the ps3 setting to read "7.1 channel 192 kHz LPCM" and not "7.1 channel 192 kHz TrueHD".

thehun
03-03-08, 01:19 AM
My Integra DTC 9.8 displays 172.4kHz when I feed it a SACD signal from the PS3. Now, I don't know if the SACD has that kind of sampling, or if the PS3 is upsampling. Also, since the signal comes in at such high resolution, the Audissey settings are deactivated automatically.... In any instance, it still sounds fantastic.

That's the conversion rate the PS3 uses from DSD to PCM.
FYI the Integra will receive PCM signals up to 192 khz, but it won't be able to do any post processing to the signal besides bass management. No Audessy for instance.

thehun
03-03-08, 01:26 AM
According to the Wikipedia article on Dolby TrueHD (I find their articles on audio and video formats are usually well-referenced):


http://en.wikipedia.org/wiki/Dolby_truehd

Therefore, future Blu-ray releases could have 5.1 channel 192 kHz soundtracks. Sony (and other manufacturers?) must have decided "let's include such a setting on our players for future-proofing, i.e. compatibility with discs that might be released in the future."

According to the article, 5.1 channel 192 kHz is compatible with the existing Blu-ray spec,

And what's the point when the original masters are 24/48? You're not getting any real benefit at all, unless you had bought into the myth that CD's upsampled are sound better.

William
03-03-08, 08:26 AM
My Integra DTC 9.8 displays 172.4kHz when I feed it a SACD signal from the PS3. Now, I don't know if the SACD has that kind of sampling, or if the PS3 is upsampling. Also, since the signal comes in at such high resolution, the Audissey settings are deactivated automatically.... In any instance, it still sounds fantastic.

You do know that your Integra will accept and process DSD bitstream with no conversion to LPCM.

SiriuslyCold
03-03-08, 10:45 AM
You do know that your Integra will accept and process DSD bitstream with no conversion to LPCM.

You do know that the PS3 does not output a DSD bitstream?

William
03-03-08, 11:02 AM
You do know that the PS3 does not output a DSD bitstream?

Didn't know that. :eek: I use an OPPO 980 for SA-CD (DSD)/DVD-A and a PS3 for BD.

SiriuslyCold
03-03-08, 05:03 PM
Yea, the PS3 converts the DSD to 24b/176.4kHz PCM. it actually makes sense - this way, any HDMI v1.1 capable receiver can play SACDs from the PS3.

Now, if only there were more contemporary releases...