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Old 13th September 2003, 01:28 PM   #1
Prune is offline Prune  Canada
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Default 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?
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Old 13th September 2003, 01:58 PM   #2
A 8 is offline A 8  Sweden
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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?
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Old 13th September 2003, 02:17 PM   #3
Prune is offline Prune  Canada
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It's one of Chesky's 24/96 (Three Psalms for String Orchestra).
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Old 13th September 2003, 05:01 PM   #4
A 8 is offline A 8  Sweden
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Ok....do you get confirmation from the dac that it actually recieves 96kHz?
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Old 13th September 2003, 06:09 PM   #5
Prune is offline Prune  Canada
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I see your point. But I don't know, since the DAC has no such indicator; it's this DAC: Cheap 24/96 DAC, Revision B.
So I don't know how else to check.
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Old 14th September 2003, 10:05 AM   #6
A 8 is offline A 8  Sweden
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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.
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Old 17th September 2003, 09:11 AM   #7
alfsch is offline alfsch  Germany
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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
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Old 18th September 2003, 12:55 PM   #8
tiroth is offline tiroth  United States
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All of the newer consumer interfaces support 24/96.
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Old 18th September 2003, 06:44 PM   #9
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Some support 24-bit, 192 kHz.

Stu
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Old 18th September 2003, 07:24 PM   #10
A 8 is offline A 8  Sweden
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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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