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Can we play genuine DSD Stream with PCs?, Moved (back) to Audio Hardware by request
Happy Water
post Feb 15 2012, 23:41
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Hi,

now ripping a SACD is possible and we can play SACD ISO with foobar2000.
But still, we must convert DSD stream to a PCM stream and then output it to the PC soundcard or
a DA/C through USB 1394 HDMI or SPIDF, etc..

I saw the autodetect ASIO Driver Mode in foo_input_sacd plugin Preferences page of foobar2000, but I don't know any Devices(both soundcard and DAC)
that supports it. Now I'm really looking forward to a scheme that can play genuine DSD Stream with PC...

Does anyone have any ideas or suggestions?

Thanks...
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saratoga
post Feb 21 2012, 01:34
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Internally most DACs seem to prefer to work with DSD by first converting it to the same intermediate format as they do PCM audio, so I'm not sure theres any point in trying to play DSD on the PC. You can get more or less the same effect using the PCM interface as the DSD one (at least assuming you have a high enough sampling rate).
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Happy Water
post Feb 21 2012, 10:58
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QUOTE (saratoga @ Feb 21 2012, 01:34) *
Internally most DACs seem to prefer to work with DSD by first converting it to the same intermediate format as they do PCM audio, so I'm not sure theres any point in trying to play DSD on the PC. You can get more or less the same effect using the PCM interface as the DSD one (at least assuming you have a high enough sampling rate).

"intermediate format" do you mean that some DACs prefer to convert PCM into Analog Signal by using delta-sigma modulation(or just like a Class D Amplifier)?
I'm not sure what do you mean.But in my poor opinion, only a few Products perform such actions, so it doesn't matter a lot to the topic.

In theory, we need just a LPF to convert a DSD bit stream into an Analog Signal(however, to achieve a good sound quality, a good implementation is necessary).
And converting DSD into PCM will loss almost all the advantages of DSD(Base Band SNR, bitrate, etc.). <--Anyway, PCM does not have such a high sampling rate as DSD do, thus, we can never Cover(convert without any theorical losses) a DSD stream by a PCM stream.
That is why I turned to Devices that *REALLY* support DSD playing. Even if there is not so much difference in sound quality that I can hear.
In one word, I'm trying to find out a theorically ideal device(no matter Soundcard or DAC).

On the other hand, just like we rip CDs into PC. PC can provide us flexible interface, large storage space and lots of other conveniences. So it is not pointless in trying to play DSD on the PC.

Still on my way...
Please help.Thanks.

This post has been edited by Happy Water: Feb 21 2012, 11:01
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Arnold B. Kruege...
post Feb 21 2012, 14:01
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QUOTE (Happy Water @ Feb 21 2012, 04:58) *
And converting DSD into PCM will loss almost all the advantages of DSD(Base Band SNR, bitrate, etc.).


AFAIK none of those purported advantages actually exist.

For example both DSD and PCM can provide improved Base Band dynamic range.

You seem to be confused about information theory which states that no matter how you do it, there are iron rules that connect data rates, bandwidth, and dynamic range.

QUOTE
<--Anyway, PCM does not have such a high sampling rate as DSD do,


Again you seem to be making up science as you go along. Sampling bits and sampling words are not directly analogous.

I repeat without fear of effective contradiction that Information Theory still rules.

It is pretty well known among the more technically sophisticated members of the audio industry that DSD was invented by Sony for the purposes of IP protection, not better sound.



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