DSD-2-PCM -- proof of concept, test sample and source code here Options

[SebastianG]

The ZIP contains 4 files:
- dsd2pcm.jar (the converter written in Java, outputs raw 24/88 PCM, intel byte order)
- info.txt (contains some infos)
- test2822k.dsd (14 seconds, mono DSD, 5 megs)
- test44k.mp3 (conversion result)

have fun,
Sebi

Edit-2011: For the latest C/C++ source code see https://code.google.com/p/dsd2pcm/ It is released under the new BSD license. The attatchment to this post is still the first Java release.



This post has been edited by SebastianG: Dec 4 2011, 17:45

Attached File(s)

 dsd2pcm.zip ( 3.56MB ) Number of downloads: 2486

 

[Axon]

Yes, let's all thank LukeS for being a boy scout and reciting Digital Signal Processing 101 to the rest of us. Particularly that bit about how designing reconstruction filters with a transition band of 0.08Fs is impossible, which is why you can't encode 0-22k perfectly in Fs=48khz. And how FIR filters cause nonlinear distortion.

Sorry for being a bastard, since it doesn't seem like you're wrong per se, at least on most of what you're saying. Nobody's disputing that the transition band ought to be at least a couple khz wide to reduce ringing, or that we'd all like to increase sample rates in the absence of any other cost or effect.

You've read Lipshitz/Vanderkooy, right?

This post has been edited by Axon: Nov 25 2009, 05:18

[udauda]

You've read Lipshitz/Vanderkooy, right?

The question I am about to ask might be quite irrelevant from the topic but I've been wondering for too long..

Does the Lipshitz/Vanderkooy paper correspond with this article at ESP?
http://sound.westhost.com/cd-sacd-dvda.htm

This post has been edited by udauda: Nov 26 2009, 02:37

[2Bdecided]

Does the Lipshitz/Vanderkooy paper correspond with this article at ESP?
http://sound.westhost.com/cd-sacd-dvda.htm

Not really, they're separate and independent, by different authors.

Lipshitz and Vanderkooy show inherent distortion in 1-bit systems. Your links discusses inherent noise. They're two different problems.

Cheers,
David.

[vincefalks]

Lip*****z and Vanderkooy show inherent distortion in 1-bit systems.

This is definitely off-topic, but can I briefly ask - is the distortion in 1-bit audio similar to the distortion in vinyl? And is this 1-bit distortion audible...like vinyl's...thx

[rpp3po]

Yawn! Am I really the last one to get where this guy is coming from?

No, of course it not similar! Why should the distortion of 1-bit Delta-Sigma-Modulation correlate with the molecular properties of vinyl and dust, and the mechanical properties of manual tracking and needle movement? That question seems to come from a mind desperately wanting to finally give some sense to a senseless belief system, fed by marketing and idiot group think.

The only similarity is that both distortions are non-linear, but also are vocoders and wah-wah effects.

This post has been edited by rpp3po: Nov 26 2009, 13:10

[vincefalks]

Yawn! Am I really the last one to get where this guy is coming from?

No, of course not! Why should the distortion of 1-bit Delta-Sigma-Modulation correlate with the molecular properties of vinyl and dust, and the mechanical properties of manual tracking and needle movement? That question seems to come from a mind desperately wanting to finally give some sense to a senseless belief system, fed by marketing and idiot group think.

The only similarity is that both distortions are non-linear, but also are vocoders and wah-wah effects.

You're so used to wild audiophiles claiming crazy theories that you automatically assume someone bringing up a question like mine means they also have a wild theory.

How wrong you are!

THIS is where I am coming from: Very uneducated vinyl zealots (I believe Michael Fremer said this on a youtube video) think that vinyl's warmth is what "lifelike analog" sound is (compared to "cold" jagged digital). (when in fact it is certain distortions in the medium). SACD zealots also think that SACD has a "lifelike analog" sound, but I know that SACD also has certain distortions in it.

Thus I've been wondering, PONDERING (and not even claiming!) if there might be a correlation between these two scenarios, or if it's just a funny coincidence. I don't know much about these distortions, and wanted to briefly ask someone who does. this is an audio forum about HELPING others and sharing scientifically valid information. I asked a question, that's all..

A simple no would suffice, along with some explanation and without the attitude and assumptions unrelated to the content of the question. And you didn't answer my second part of the question, "And is this 1-bit distortion audible?".

[rpp3po]

At least you seem believe the life-like-analog-sound-myth of SACD.

When properly dithered, in this context that means only partially dithered, SACD's distortions are inaudible in the 0-22kHz band (and above anyway).

[vincefalks]

At least you seem believe the life-like-analog-sound-myth of SACD.

LOL. Just stop. Nothing I have written has indicated what you just claimed, in fact, the exact opposite. I was comparing both myths to each other and wondering about a possible reason behind SACD's case, of which I don't know much about the science.

When properly dithered, in this context that means only partially dithered, SACD's distortions are inaudible in the 0-22kHz band (and above anyway).

Ah now that's better. t h a n k y o u.

back on topic now...