Sample rates

[Prune]

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]

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]

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

 

[A 8]

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

 

[Prune]

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/showthread.php?s=&threadid=7974&highlight=revision+b
So I don't know how else to check.

 

[A 8]

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]

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]

All of the newer consumer interfaces support 24/96.

 

[maczrool]

Some support 24-bit, 192 kHz.

Stu

 

[A 8]

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.