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Philips SBC HD 1500 wireless DH manual - Page 2

post #16 of 23
2/11/04 at 12:14am
Quote:
Originally posted by Eric F
DTS decodes to 20bits.
I strongly suspect that the commercial Dolby Headphone chips/code out there only decode DTS to 16 bits.
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post #17 of 23
5/25/04 at 1:52am
Quote:
Originally Posted by Music Fanatic
I strongly suspect that the commercial Dolby Headphone chips/code out there only decode DTS to 16 bits.
The very first Dolby Headphone IC, the Sanyo LC83200W, accepts 16, 18, 20, or 24-bit PCM. This is the IC inside the Pioneer units, for example.
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post #18 of 23
5/27/04 at 1:32pm
Thread Starter 
The Pioneer 800C works with 32bit off my PC's digital coax. I was surprised that it worked.

I use Foobar to output 32bit from my Revolution soundcard.
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post #19 of 23
5/28/04 at 1:45am
32-bit mode has to do with how the PCM data is packed into the S/PDIF format. It means the two subframes of the S/PDIF frame each carry a 16-bit word (normal 16-bit PCM). This is known as the "consumer" mode of the interface. The two subframes must carry the same type of data. It can be PCM or coded audio like Dolby Digital.

In the alternative AES/EBU mode (also called the 16-bit mode), the two subframes may carry similar or independant information.
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post #20 of 23
5/28/04 at 5:14pm
Thread Starter 
Say what?

Once again in English please?
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post #21 of 23
5/28/04 at 6:26pm
I think your sound card's 32-bit mode does not mean you are getting PCM at 32-bits resolutiuon, but 2 channels at 16-bits each. So the Pioneer 800 would be quite happy with that. It's exactly the same kind of PCM you'd get from a CD or DVD player.
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post #22 of 23
5/28/04 at 6:35pm
Thread Starter 
Well, The M-Audio Revolution is rated for 24bit/192kHz, and Foobar will only output as high 32bit fixed point or 24bit fixed-point padded to 32bit. 24bit Fixed point doesn't seem to work. The card can genuinely handle 24/192, I'm using it with ASIO output.

I'm a bit confused about this. What would be the best?

Either way it sounds pretty impressive. I am currently listening to some BBC Radio-productions, and DH does a great job of putting the voices at varying places. Even more impressive is the voices tend to stay in one place and not float around like other imaging systems do.
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post #23 of 23
5/28/04 at 6:45pm
The sound card may have much higher capabilities for digital audio handling, in terms of sample rates and bit depths, than can be output via the S/PDIF format, which is limited to 44.1/48 kHz and 16 bits. The only way to get up to 24-bit data into the Pioneer 800 is to use Dolby Digital or DTS bitstreams. If your sound card is successfully operating with all your various sources, and driving the DIR800 nicely, then it is set right. Until interfaces like Firewire become popular on consumer gear, S/PDIF inputs are the bottleneck.
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