Sample rates - I'm confused - AVS Forum
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Old 05-19-2007, 12:55 AM - Thread Starter
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Sorry if this is a really dumb question.

I have a Samsung HD-950 connected to my Pioneer VSX 1011 AVR via 6 analogue connections for HR and a coax digital connection for LPCM, DD and DTS. Usually I select the MULTI IN to listen to my limited collection of HR discs in surround. Most of the DVD-A discs I have 96K for both the 5.1 and the 2CH version on the cover notes.

I have found that if I select the 2CH version of the audio, that I can also use the digital connection. It only passes the L R in this mode so I have to select 2CH or I miss the content of the other channels. When I listen to a 2CH CD, I also select the DIRECT mode. In listening to the difference between the analogue and digital in for the 2CH version, I found that digital seemed a little more crisp.

So here is my dumb question - why does the AVR display 88K if these discs are sampled at 96K?

Mark

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Old 05-23-2007, 04:16 AM
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Misprint on the disc cover?
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Old 05-23-2007, 08:45 AM
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DVD-As are in fact 96K for the most part. My guess is your player is re-sampling it to 88K before transmitting it out over S/PDIF.
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Old 05-23-2007, 11:17 AM
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Quote:
Originally Posted by obie_fl View Post

DVD-As are in fact 96K for the most part. My guess is your player is re-sampling it to 88K before transmitting it out over S/PDIF.

It's nonsense to say that DVD-A are 96K for the most part.
There are serious numbers at 48KHz, and a fair quantity at 88.2 as well.

Any player that is resampling to 88.2 before outputting is clearly not up to spec either, as the stereo component will also be MLP Lossless and the output must be exactly the same as the input to pass spec.
Most likely explanation is the disc is 88.2.

What title are we talking about?
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Old 05-23-2007, 02:16 PM
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Quote:
Originally Posted by neil wilkes View Post

Most likely explanation is the disc is 88.2.

Yeah, I have some @ 88.2. Pat Metheny's "Imaginary Day" comes to mind.

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Old 05-25-2007, 07:40 AM
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When I made the original statement I was only thinking of high sampling rate discs, I was aware of 48Khz discs. What I wasn't aware of was 88.2 discs, although I have seen players that output 88.2 when converting DSD or upsampling. Sorry for the confusion, I'll have to go back and check some of my discs for 88.2Khz, just never noticed any,and I have quite a few DVD-As.
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Old 05-25-2007, 06:31 PM
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Quote:
Originally Posted by obie_fl View Post

I have seen players that output 88.2 when converting DSD

Makes sense, since the sampling rate for DSD is 64 x 44.1 (CD sampling rate). My Oppo player outputs DSD converted to PCM at 88.2; I think the PS3 lets the user choose 88.2 or 176.4 kHz.

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Old 05-26-2007, 05:54 PM
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Exactly the two players I was thinking of Sanjay.
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