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-   -   Sample rates (http://www.diyaudio.com/forums/digital-source/20224-sample-rates.html)

Prune 13th September 2003 01:28 PM

Sample rates
 
I got a DVD with 24/96 PCM tracks and set the PCM output of my DVD player to 96KHz and works fine with the DIY DAC I have.
The weird thing is, when I hooked the digital out to my three year old computer speakers, the FPS2000 digital, I still get sound...I don't see how that can be when I'm sure that the FPS2000 was designed for the 48KHz sampling rate of the SBLive card. What's going on here?

A 8 13th September 2003 01:58 PM

It might downconvert due to copyprotection.

There are very few(I don't know any) 24/96 dvdvideo discs.
Are you really sure its not a 24/48 track?

Prune 13th September 2003 02:17 PM

It's one of Chesky's 24/96 (Three Psalms for String Orchestra).

A 8 13th September 2003 05:01 PM

Ok....do you get confirmation from the dac that it actually recieves 96kHz?

Prune 13th September 2003 06:09 PM

I see your point. But I don't know, since the DAC has no such indicator; it's this DAC: http://www.diyaudio.com/forums/showt...ght=revision+b
So I don't know how else to check.

A 8 14th September 2003 10:05 AM

The dvdplayers I've had have all handled bith dephts and sampling freq slightly different, many downconvert to 16/48.
Some ignore copyprotection flags and some don't but still downconvert etc.

The manuals sometimes describes how the player manages its digital output so if not done already I suggest you read it carefully.

alfsch 17th September 2003 09:11 AM

Hi,
your dvd is prob 96/24, but most dvd players have only 48k output digital, because of some copy protection or so (silly).
the next problem is: 96k24bit has to much bit-rate for standard spdif interface, i think only the so-called professional aes-ebu can do this...
alf

tiroth 18th September 2003 12:55 PM

All of the newer consumer interfaces support 24/96.

maczrool 18th September 2003 06:44 PM

Some support 24-bit, 192 kHz.

Stu

A 8 18th September 2003 07:24 PM

2 Attachment(s)
This is a scan (sorry for the quality) from the Toshiba SD900 manual and it shows that the highest bitrate and sampling freq on its digital output are 16/48.

So yes, technically many support more but it has often been limited per design.

One player I know of that actually output 24 bits independantly of copy protection flags was my (region free and macrovision free by hardware) old Pioneer 717.


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