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aparatusonitus 21st August 2010 06:54 AM

Audio Alchemy DDE v1.1 schematic
I'm looking for an Audio Alchemy DDE v1.1 dac schematic based on CS4303 dac (managed to cannibalise one from an old, not working Philips CDi player), hardwired it to SAA7310 in a working player via I2S, plug in some quad flip-flops after CS4303 to perform 1-bit conversion and opamps based LP filter and it does sound really, really nice. So I'm looking for AA DDE v1.1 sch to see how they implemented CS8412 -> CS4303 as standalone unit...thx in advance.

aparatusonitus 25th August 2010 08:35 AM


aparatusonitus 27th August 2010 03:18 PM

Hi rubicon,

Thx for the info, I'll do that!

aparatusonitus 9th May 2011 09:07 AM

Still looking:(

SoNic_real_one 10th May 2011 04:12 PM

I found only the DAC-20 DDE3:
ALCHEMY DAC-20 DDE 3 Service Manual free download, schematics, eeprom, repair info for electronics

aparatusonitus 10th May 2011 04:25 PM

Thanks for replay SoNic, I already have that one ;-)...but the one that really interest me is AA DDE v1.1 with CS4303 so I can use its bitstream outputs directly to FF + passive LP filter, so FF will actually do digital to analog conversion, not CS4303 ;-)

SoNic_real_one 10th May 2011 10:00 PM

Well, data sheet of CS4303 should be enough then, no?
LE: If you find it. I would ask CS for it...

aparatusonitus 10th May 2011 10:06 PM

Right, but would like to see is there any reclocking involved in AA and how it's implemented (you see digital is not my cap of tee...)

aparatusonitus 10th May 2011 10:27 PM

I've the CS4303 datasheet, and I know how to wire it to CS841x, but in my case, thing are little different...I would like to reclock after CS4303, prior to my "dac" 74AC175 followed by entirely passive LP filter (no active element here to screw up the sound)...all is well documented in the CS4303 evaluation board, named CDB4303, which I don't have btw :-(

SoNic_real_one 10th May 2011 10:36 PM

D flip-flops don't "reclock".
They will skip or repeat samples periodically, based on instantaneous delta F.

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