Pcm56 Nonos

Calamaro · 18th July 2008, 02:31 PM

Modded a few Tda1541 based players to nonoversampling and I love the sound.
Now I would like to try with an old Sony cdp M49 with Burr Brown PCM56 dacs. It has CXD25009 digital signal processor, CXD2551P digital filter, MC74HCU04N inverter + 2 PCM56. I wonder if I simply could bypass the filter but it seems a little more complicated...

Bernhard · 18th July 2008, 05:01 PM

I would recommend a CS8412...

wa2ise · 18th July 2008, 05:40 PM

Looks like it would take a fair amount of "glue" logic and some small FIFO chips. Don't know how deep you want to go in that direction.

I did mods on the analog side with the PCM61 and 56 chips, see http://pw2.netcom.com/~wa2ise/radios/tubedac.htm#tubedac
using vacuum tubes.

Bernhard · 18th July 2008, 09:00 PM

And best use a reconstruction filter like this to to eliminate hf and compensate for treble rolloff

Calamaro · 19th July 2008, 03:10 PM

Oh yes, it is more complicated! Thank you very much for your answers, this definitely exceeds my possibilities

18th July 2008, 05:40 PM	#3
wa2ise diyAudio Member Join Date: Apr 2005 Location: NJ	Looks like it would take a fair amount of "glue" logic and some small FIFO chips. Don't know how deep you want to go in that direction. I did mods on the analog side with the PCM61 and 56 chips, see http://pw2.netcom.com/~wa2ise/radios/tubedac.htm#tubedac using vacuum tubes. __________________

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18th July 2008, 05:01 PM	#2
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	I would recommend a CS8412...

18th July 2008, 09:00 PM	#4
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	And best use a reconstruction filter like this to to eliminate hf and compensate for treble rolloff

19th July 2008, 03:10 PM	#5
Calamaro diyAudio Member Join Date: Mar 2008	Oh yes, it is more complicated! Thank you very much for your answers, this definitely exceeds my possibilities

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