High resolution (sa)cd output

aaronboumans · 5th January 2006, 01:36 PM

I was thinking;
Does anyone have any experience in modding a sacd-player so that it would have a high res. digital output.
I know Oehlrich has done a terrific job on a pioneer 575a but it only does 88.2khz. I would like a 176.4khz output.

So I have the follwoing suggestion;
Take a sony xe-670 which has dsd1702 dac. Now take a pcm4204 (or maybe sm5819) and convert dsd to pcm and then to aes/spdif.
The dsd1702 and pcm 4204 are both from TI's Burr Brown so maybe they have the same dsd input-format?
Anyone any experience with this? Anyone interested in doing so?
Maybe someone (in the Netherlands) would like to help or try with me?

aaronboumans · 9th January 2006, 10:41 AM

again, nobody?

rfbrw · 9th January 2006, 03:41 PM

The PCM4204 will only convert DSD to the base rate which is 44K1.

aaronboumans · 9th January 2006, 05:59 PM

I have read the pcm's PDF again and I now know this
DSD input is 64fS (64x44.1=2,8224Mhz which is the SACD freq. This is also the DSD freq that the dsd1702 accepts, must be correct

) This is called dualrate. And according to page 16 of the pdf; the dual rate mode is utilized for sampling frequencies higher than 54kHz and up to 108kHz. So max will be 88,2kHz stereo

Conclusion; it is better to use oehlrich's pioneer-output

rfbrw · 9th January 2006, 06:33 PM

Oehlrich's board assumes you have internal DSD to PCM conversion and you will not get 88k2 out of the PCM4204. You would be better served by the NPC SM5816AF.

aaronboumans · 10th January 2006, 06:56 AM

according to;
http://www.npcamerica.com/Datasheets/SM5816.pdf

page 3 suggests that one can convert dsd to pcm with 8fs 24/32bit
8fs=8x44.1khz=352.8khz

hmm can this be something?

Thanks rfbrw, I will look into it. Anyone else any suggestions?

rfbrw · 10th January 2006, 10:13 AM

All you have to do now is get the chip.

aaronboumans · 10th January 2006, 11:40 AM

this can be difficult I suppose?

rfbrw · 10th January 2006, 02:49 PM

Quote:

Originally posted by aaronboumans
this can be difficult I suppose?

It has been that way in the past but you could give these guys a bell. http://www.kagaeuro.com/npc.html

dorkus · 12th January 2006, 01:16 AM

fascinating chip, that NPC. i wonder how the decimation filters sound. i suppose if you had the know-how you could feed it your own coefficients.

if i were able to build my dream all-digital stereo system, i would use that chip so i could perform DSP on DSD.

i guess you will never see a commercial product with high-res PCM out on SACD tho, due to copyright restrictions. i hate sony.

5th January 2006, 01:36 PM	#1
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	High resolution (sa)cd output I was thinking; Does anyone have any experience in modding a sacd-player so that it would have a high res. digital output. I know Oehlrich has done a terrific job on a pioneer 575a but it only does 88.2khz. I would like a 176.4khz output. So I have the follwoing suggestion; Take a sony xe-670 which has dsd1702 dac. Now take a pcm4204 (or maybe sm5819) and convert dsd to pcm and then to aes/spdif. The dsd1702 and pcm 4204 are both from TI's Burr Brown so maybe they have the same dsd input-format? Anyone any experience with this? Anyone interested in doing so? Maybe someone (in the Netherlands) would like to help or try with me? __________________ I hate carryable audio-equipment!

9th January 2006, 10:41 AM	#2
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	again, nobody? __________________ I hate carryable audio-equipment!

9th January 2006, 05:59 PM	#4
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	I have read the pcm's PDF again and I now know this DSD input is 64fS (64x44.1=2,8224Mhz which is the SACD freq. This is also the DSD freq that the dsd1702 accepts, must be correct ) This is called dualrate. And according to page 16 of the pdf; the dual rate mode is utilized for sampling frequencies higher than 54kHz and up to 108kHz. So max will be 88,2kHz stereo Conclusion; it is better to use oehlrich's pioneer-output __________________ I hate carryable audio-equipment!

10th January 2006, 06:56 AM	#6
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	according to; http://www.npcamerica.com/Datasheets/SM5816.pdf page 3 suggests that one can convert dsd to pcm with 8fs 24/32bit 8fs=8x44.1khz=352.8khz hmm can this be something? Thanks rfbrw, I will look into it. Anyone else any suggestions? __________________ I hate carryable audio-equipment!

10th January 2006, 11:40 AM	#8
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	this can be difficult I suppose? __________________ I hate carryable audio-equipment!


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9th January 2006, 03:41 PM	#3
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	The PCM4204 will only convert DSD to the base rate which is 44K1.

9th January 2006, 06:33 PM	#5
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Oehlrich's board assumes you have internal DSD to PCM conversion and you will not get 88k2 out of the PCM4204. You would be better served by the NPC SM5816AF.

10th January 2006, 10:13 AM	#7
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	All you have to do now is get the chip.

12th January 2006, 01:16 AM	#10
dorkus diyAudio Member Join Date: Jun 2001 Location: NYC	fascinating chip, that NPC. i wonder how the decimation filters sound. i suppose if you had the know-how you could feed it your own coefficients. if i were able to build my dream all-digital stereo system, i would use that chip so i could perform DSP on DSD. i guess you will never see a commercial product with high-res PCM out on SACD tho, due to copyright restrictions. i hate sony.

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