PCM4204, DSD to PCM conversion

nbdy · 20th November 2005, 09:14 PM

Just noticed that TI's PCM4204 seems to be usable as 4-channel DSD to PCM converter.

Using this part will be alot easier than buying Pioneer DV-575A and DV-578A or the otherwise unobtainable SM5819AF.

Hope this helps,

aaronboumans · 28th November 2005, 12:41 PM

Yes it does!
Looks very promissing. Much better than sm5819. Now we must wait for a CD/DVD/SACD-player with this chip so we can diy our way into an high performance digital (PCM) output for SACD.

nbdy · 28th November 2005, 12:54 PM

There's no need to wait for players with PCM4204 (there probably won't be any since PCM4204 is supposed to be used in professional audio equipment) - it could be hooked to any player with DSD DAC.

Or, if SACD over FireWire does not use additional DTLA encryption layer on top of the SACD stream (someone, please tell me that it doesn't) and there are any SACD players with FireWire output capability, external FireWire "ripbox" with digital 24/192 output could be realized with TSB43CB43A, PCM4204 and SPDIF transceiver.

Is there any interest in a such device?

aaronboumans · 28th November 2005, 01:04 PM

I'm not shure what you are talking about, but as I understand it the pcm4204 chip can convert a digital dsd-signal directly to high-res pcm. The pcm than can be used in dsp-based digital correction and crossover machines.

nbdy · 28th November 2005, 03:52 PM

The point is that you probably could mod just about any SACD player, not only the ones using some form of DSD-PCM conversion

aaronboumans · 29th November 2005, 08:54 AM

My point is having a high-res pcm output from sacd (after modding or implementing a diy-kit in a sacd-player). And this pcm 4204 has the ability to do just this (DSD-24/176,4 the sm5819 can only do 88,2)

DSP_Geek · 29th November 2005, 05:01 PM

You might want to check the PCM4202 link: it's a 2 channel part (the 4204 is 4 channels), in a 28 pin SSOP package compared with the 4204 in a 64 pin quad flat pack which needs heatsinking to the circuit board, so for that reason I'd say the 4202 looks easier to use in a DIY context.

The '04 supports TDM for up to 8 channels on a single serial link, whereas the '02 doesn't, but I don't think that's a deal breaker.

nbdy · 29th November 2005, 05:47 PM

PCM4202 doesn't support DSD input mode (at least as the datasheet says)

Heatsinking could be sorted out without access to reflow soldering equipment by placing thermal interface between board and powerpad and/or conventional heatsink on top of the chip

DSP_Geek · 29th November 2005, 08:53 PM

Oops, you're right, forgot to check that.

I presume you're thinking of recreating the system clock from the various bit clocks?

nbdy · 30th November 2005, 05:54 AM

That's one possibility, other is using the player's system clock since it's there and could be tapped from the same DSD DAC we're getting the DSD bitstream from

20th November 2005, 09:14 PM	#1
nbdy diyAudio Member Join Date: Dec 2004 Location: here now	PCM4204, DSD to PCM conversion Just noticed that TI's PCM4204 seems to be usable as 4-channel DSD to PCM converter. Using this part will be alot easier than buying Pioneer DV-575A and DV-578A or the otherwise unobtainable SM5819AF. Hope this helps,

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28th November 2005, 12:41 PM	#2
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	Yes it does! Looks very promissing. Much better than sm5819. Now we must wait for a CD/DVD/SACD-player with this chip so we can diy our way into an high performance digital (PCM) output for SACD.

28th November 2005, 12:54 PM	#3
nbdy diyAudio Member Join Date: Dec 2004 Location: here now	There's no need to wait for players with PCM4204 (there probably won't be any since PCM4204 is supposed to be used in professional audio equipment) - it could be hooked to any player with DSD DAC. Or, if SACD over FireWire does not use additional DTLA encryption layer on top of the SACD stream (someone, please tell me that it doesn't) and there are any SACD players with FireWire output capability, external FireWire "ripbox" with digital 24/192 output could be realized with TSB43CB43A, PCM4204 and SPDIF transceiver. Is there any interest in a such device?

28th November 2005, 01:04 PM	#4
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	I'm not shure what you are talking about, but as I understand it the pcm4204 chip can convert a digital dsd-signal directly to high-res pcm. The pcm than can be used in dsp-based digital correction and crossover machines.

28th November 2005, 03:52 PM	#5
nbdy diyAudio Member Join Date: Dec 2004 Location: here now	The point is that you probably could mod just about any SACD player, not only the ones using some form of DSD-PCM conversion

29th November 2005, 08:54 AM	#6
aaronboumans diyAudio Member Join Date: Feb 2003 Location: deventer	My point is having a high-res pcm output from sacd (after modding or implementing a diy-kit in a sacd-player). And this pcm 4204 has the ability to do just this (DSD-24/176,4 the sm5819 can only do 88,2)

29th November 2005, 05:01 PM	#7
DSP_Geek diyAudio Member Join Date: Aug 2003 Location: Santa Cruz, California	You might want to check the PCM4202 link: it's a 2 channel part (the 4204 is 4 channels), in a 28 pin SSOP package compared with the 4204 in a 64 pin quad flat pack which needs heatsinking to the circuit board, so for that reason I'd say the 4202 looks easier to use in a DIY context. The '04 supports TDM for up to 8 channels on a single serial link, whereas the '02 doesn't, but I don't think that's a deal breaker.

29th November 2005, 05:47 PM	#8
nbdy diyAudio Member Join Date: Dec 2004 Location: here now	PCM4202 doesn't support DSD input mode (at least as the datasheet says) Heatsinking could be sorted out without access to reflow soldering equipment by placing thermal interface between board and powerpad and/or conventional heatsink on top of the chip

29th November 2005, 08:53 PM	#9
DSP_Geek diyAudio Member Join Date: Aug 2003 Location: Santa Cruz, California	Oops, you're right, forgot to check that. I presume you're thinking of recreating the system clock from the various bit clocks?

30th November 2005, 05:54 AM	#10
nbdy diyAudio Member Join Date: Dec 2004 Location: here now	That's one possibility, other is using the player's system clock since it's there and could be tapped from the same DSD DAC we're getting the DSD bitstream from

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