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DSD-2-PCM -- proof of concept, test sample and source code here
SebastianG
post Oct 8 2005, 23:55
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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
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Attached File  dsd2pcm.zip ( 3.56MB ) Number of downloads: 2905
 
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Axon
post Nov 25 2009, 04:59
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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
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LukeS
post Nov 25 2009, 05:21
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QUOTE (Axon @ Nov 24 2009, 22:59) *
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?


No need to be sarcastic, if you feel like explaining it better please do so. I may have messed up the terminology because DSP is not my thing. I am not much of an analog or DSP person, I do digital design and prefer to stick with board design and digital logic design. The bottom line was I knew that 48kHz does not perfectly preserve the 0-22kHz band and the guy wanted an explanation so I tried.

Thanks for the link to the paper, I am really new to SACD and i'll give it a read.

I nowhere claim SACD is perfect either and really just want to rip it for the multichannel audio that many artists do not offer in any other format.

This post has been edited by LukeS: Nov 25 2009, 05:26
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Martel
post Nov 25 2009, 10:24
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QUOTE (LukeS @ Nov 25 2009, 05:21) *
The bottom line was I knew that 48kHz does not perfectly preserve the 0-22kHz band and the guy wanted an explanation so I tried.
The question is - how many people actually care? If you have a 48kHz fs content which is has a low-pass applied rolling-off from 21kHz (say -3dB @ 21kHz) how many people would be able to actually hear this? I remember when I was 18 I could hear up to 20kHz (18,5 kHz @ 29) but since most people usually don't have enough money at that age to buy an equipment able to reproduce such content flawlessly, I guess it does not matter much if at all (the consequences being largely academical).
The point is, if you want to hear the "true music", you go to a live performance where the stuff in question does not usually matter. smile.gif


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Posts in this topic
- SebastianG   DSD-2-PCM -- proof of concept   Oct 8 2005, 23:55
- - skamp   Now you need to develop a DVD-ROM driver for readi...   Oct 9 2005, 01:27
|- - SebastianG   QUOTE (skamp @ Oct 9 2005, 01:27 AM)Now you n...   Oct 9 2005, 10:32
|- - SebastianG   Oh, I noticed a small bug: The dsd file size must ...   Oct 9 2005, 11:06
- - tarsier   So is it theoretically possible to convert the PCM...   Dec 24 2006, 20:33
|- - putanik   QUOTE (tarsier @ Dec 24 2006, 13:33) So i...   Dec 24 2006, 22:54
|- - tarsier   Thanks for the link. But right now, I'm only ...   Dec 26 2006, 16:28
|- - Kees de Visser   QUOTE (tarsier @ Dec 26 2006, 16:28) In d...   Dec 26 2006, 19:03
- - andyshedd   I'm mildly curious how this method compares an...   Jan 8 2007, 22:44
- - frenchglen   Is there any updated info about this program? I tr...   Jun 8 2009, 15:23
- - LukeS   I am bringing this back form years of being dead. ...   Nov 23 2009, 15:56
- - GeSomeone   I think it's in the first post. QUOTE (Sebasti...   Nov 23 2009, 19:12
|- - SebastianG   QUOTE (GeSomeone @ Nov 23 2009, 19:12) I ...   Nov 23 2009, 20:31
- - LukeS   SebastianG, Awesome job on the program, my proble...   Nov 23 2009, 22:32
|- - vincefalks   I am not an expert but it would be cool to compare...   Nov 24 2009, 00:17
|- - rpp3po   What would be a higher quality approach than 1. co...   Nov 24 2009, 02:48
- - SebastianG   QUOTE (LukeS @ Nov 23 2009, 22:32) The ou...   Nov 24 2009, 10:38
- - 2Bdecided   With the huge caveat that I made no attempt to do ...   Nov 24 2009, 12:40
- - vincefalks   The noise is indeed a problem with the DSD format ...   Nov 24 2009, 13:07
|- - rpp3po   The problem with the "most accurate capture...   Nov 24 2009, 14:01
|- - vincefalks   QUOTE (rpp3po @ Nov 24 2009, 15:01) The p...   Nov 24 2009, 14:25
||- - Canar   QUOTE (vincefalks @ Nov 24 2009, 08:25) I...   Nov 24 2009, 15:49
||- - rpp3po   Raw DSD means saving about 3 GB per 70 minute ster...   Nov 24 2009, 17:23
||- - BOBCHEWIE   QUOTE (rpp3po @ Nov 24 2009, 10:23) Raw D...   Jan 3 2010, 12:14
||- - rpp3po   QUOTE (BOBCHEWIE @ Jan 3 2010, 12:14) scr...   Jan 3 2010, 14:15
||- - Axon   QUOTE (BOBCHEWIE @ Jan 3 2010, 05:14) QUO...   Jan 3 2010, 14:22
||- - Martel   QUOTE (BOBCHEWIE @ Jan 3 2010, 12:14) ......   Jan 4 2010, 09:53
|- - Mike Giacomelli   QUOTE (rpp3po @ Nov 24 2009, 08:01) DSD h...   Nov 24 2009, 15:46
- - LukeS   QUOTE (rpp3po @ Nov 24 2009, 08:01) The p...   Nov 24 2009, 21:39
|- - rpp3po   QUOTE (LukeS @ Nov 24 2009, 21:39) 48kHz ...   Nov 25 2009, 03:00
||- - LukeS   QUOTE (rpp3po @ Nov 24 2009, 21:00) QUOTE...   Nov 25 2009, 04:20
||- - Mike Giacomelli   QUOTE (LukeS @ Nov 24 2009, 22:20) QUOTE ...   Nov 25 2009, 05:25
||- - LukeS   QUOTE (Mike Giacomelli @ Nov 24 2009, 23...   Nov 25 2009, 05:29
||- - Mike Giacomelli   QUOTE (LukeS @ Nov 24 2009, 23:29) Also I...   Nov 25 2009, 05:55
|- - vincefalks   QUOTE (LukeS @ Nov 24 2009, 22:39) I am v...   Nov 25 2009, 08:02
|- - knutinh   QUOTE (LukeS @ Nov 24 2009, 21:39) Also t...   Nov 25 2009, 08:36
- - Axon   Look into the dynamic range of SACD at 22khz somet...   Nov 24 2009, 21:56
- - Axon   Yes, let's all thank LukeS for being a boy sco...   Nov 25 2009, 04:59
|- - LukeS   QUOTE (Axon @ Nov 24 2009, 22:59) Yes, le...   Nov 25 2009, 05:21
||- - Martel   QUOTE (LukeS @ Nov 25 2009, 05:21) The bo...   Nov 25 2009, 10:24
|- - 2Bdecided   QUOTE (Axon @ Nov 25 2009, 03:59) Sorry f...   Nov 25 2009, 12:13
|- - udauda   QUOTE (Axon @ Nov 24 2009, 19:59) You...   Nov 26 2009, 02:31
|- - 2Bdecided   QUOTE (udauda @ Nov 26 2009, 01:31) Does ...   Nov 26 2009, 11:46
|- - vincefalks   QUOTE (2Bdecided @ Nov 26 2009, 12:46) Li...   Nov 26 2009, 12:02
|- - rpp3po   Yawn! Am I really the last one to get where t...   Nov 26 2009, 12:37
|- - vincefalks   QUOTE (rpp3po @ Nov 26 2009, 13:37) Yawn...   Nov 26 2009, 13:10
|- - rpp3po   At least you seem believe the life-like-analog-sou...   Nov 26 2009, 13:25
|- - vincefalks   QUOTE (rpp3po @ Nov 26 2009, 14:25) At le...   Nov 26 2009, 13:40
- - LukeS   QUOTE (vincefalks @ Nov 25 2009, 02:02) Q...   Nov 25 2009, 09:16
|- - SebastianG   QUOTE (LukeS @ Nov 25 2009, 09:16) See th...   Nov 25 2009, 10:32
|- - knutinh   QUOTE (LukeS @ Nov 25 2009, 09:16) DST wo...   Nov 25 2009, 18:02
|- - simmconn   QUOTE DST would work but I have not found a no low...   Nov 26 2009, 01:31
|- - vincefalks   QUOTE (simmconn @ Nov 26 2009, 02:31) QUO...   Nov 26 2009, 03:38
- - rpp3po   Sorry, if I didn't express myself clearly enou...   Nov 25 2009, 12:04
- - Axon   It's a surprisingly well known mod, actually. ...   Nov 25 2009, 19:38
|- - rpp3po   I find it interesting, nevertheless. What equipmen...   Nov 25 2009, 20:38
- - LukeS   Wow, I really am messing thing up lately ; I got ...   Nov 26 2009, 07:27
|- - simmconn   And I just spent one and a half hours to encode an...   Nov 26 2009, 08:16
- - 2Bdecided   Yes, the distortions of SACD are inaudible. Especi...   Nov 26 2009, 15:57
- - Canar   So that's what they mean by "warm" s...   Nov 26 2009, 16:22
- - Axon   If SACD really did have a similar distortion profi...   Nov 26 2009, 21:14
- - SebastianG   Just for kicks and giggles I rewrote most of ...   Nov 27 2009, 03:26
|- - vincefalks   QUOTE (SebastianG @ Nov 27 2009, 03:26) J...   Nov 27 2009, 03:44
|- - SebastianG   QUOTE (vincefalks @ Nov 27 2009, 03:44) T...   Nov 27 2009, 04:14
||- - vincefalks   QUOTE (SebastianG @ Nov 27 2009, 04:14) S...   Nov 27 2009, 05:11
||- - Kees de Visser   There seems to be a growing (niche) market for onl...   Nov 27 2009, 09:02
||- - 2Bdecided   QUOTE (vincefalks @ Nov 27 2009, 04:11) N...   Nov 27 2009, 10:59
||- - rpp3po   QUOTE (vincefalks @ Nov 27 2009, 05:11) N...   Nov 27 2009, 12:55
|||- - 2Bdecided   QUOTE (rpp3po @ Nov 27 2009, 11:55) An an...   Nov 27 2009, 13:00
||- - krabapple   QUOTE (vincefalks @ Nov 26 2009, 23:11) T...   Nov 29 2009, 03:56
|- - rpp3po   QUOTE (vincefalks @ Nov 27 2009, 03:44) H...   Nov 27 2009, 04:16
- - LukeS   QUOTE (SebastianG @ Nov 26 2009, 21:26) J...   Nov 27 2009, 07:33
|- - smack   QUOTE (LukeS @ Nov 27 2009, 07:33) Window...   Nov 27 2009, 11:00
- - .halverhahn   DXD is PCM - just with a bunch of noise above 48kH...   Nov 27 2009, 15:34
|- - rpp3po   Wow! The DXD track is certainly nothing Bruce ...   Nov 27 2009, 17:47
- - spoon   As the noise is constant this shows the levels qui...   Nov 29 2009, 20:54
- - spoon   QUOTE The final amusing aspect to all this is that...   Nov 29 2009, 22:51
|- - krabapple   QUOTE (spoon @ Nov 29 2009, 16:51) QUOTE ...   Nov 30 2009, 06:33
- - spoon   Based on Sebastians good work I have wrapped the d...   Dec 1 2009, 17:49
- - kode54   @spoon: I presume you modified the stage 1 filter ...   Dec 1 2009, 19:55
- - spoon   I thought it was a command line option on dsd2pcm?   Dec 1 2009, 20:15
|- - kode54   QUOTE (spoon @ Dec 1 2009, 11:15) I thoug...   Dec 7 2009, 15:32
- - krabapple   This is all peachy for those recording DSD files o...   Dec 2 2009, 06:56
|- - BOBCHEWIE   QUOTE (krabapple @ Dec 1 2009, 23:56) Thi...   Jan 3 2010, 13:33
- - spoon   I might be wrong, but I do not think there are any...   Dec 2 2009, 09:55
|- - krabapple   QUOTE (spoon @ Dec 2 2009, 03:55) I might...   Dec 2 2009, 17:23
- - Martel   QUOTE There are three types of SACDs[9]: * Hy...   Dec 2 2009, 10:35
- - .halverhahn   Just for your information: Wheatus is offering The...   Dec 2 2009, 11:38
|- - 2Bdecided   QUOTE (.halverhahn @ Dec 2 2009, 10:38) J...   Dec 2 2009, 15:11
- - vincefalks   Ok finally my warning was lifted after a little si...   Dec 7 2009, 17:55
|- - krabapple   QUOTE (vincefalks @ Dec 7 2009, 11:55) QU...   Dec 7 2009, 18:26
|- - 2Bdecided   QUOTE (vincefalks @ Dec 7 2009, 16:55) I...   Dec 7 2009, 18:33
|- - spoon   Did anyone manage to decode a .dsf file? (such as ...   Dec 8 2009, 10:21
- - Martel   A (square analog) pulse has an infinitely wide spe...   Dec 7 2009, 18:26
- - udauda   I wonder, how come Pro-DSD never comes up with a s...   Jan 4 2010, 13:39
- - rpp3po   Excellent paper, thanks!   Jan 4 2010, 14:31
- - krabapple   I remember this one from a few years back....I for...   Jan 8 2010, 22:05
- - ElfeJoyeux   Hello, I just discovered this awesome topic durin...   Mar 11 2010, 22:34
|- - Hobbit13   QUOTE (ElfeJoyeux @ Mar 11 2010, 22:34) T...   Jul 19 2010, 10:48
- - Sik_Lescinovid   Has anyone so far noticed that when creating a 24 ...   Nov 27 2011, 18:28
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