Audio Alchemy DDE v1.1 schematic

[aparatusonitus]

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]

Anyone?

 

[aparatusonitus]

Hi rubicon,

Thx for the info, I'll do that!

 

[aparatusonitus]

Still looking

 

[SoNic_real_one]

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

 

[aparatusonitus]

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]

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

 

[aparatusonitus]

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]

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]

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

 

[Andrew Eckhardt]

Well, its not as if asynchronous reclocking Doesn't re-clock.

FAQ : LessLoss high end audio power cables, audiophile power cables, audiophile cables

 

[SoNic_real_one]

Throwing away samples and repeating others periodically is not what I call "reclocking". In my opinion is just garbage. Is making the jitter permanent (embedded) in the data.

 

[aparatusonitus]

See the general idea off concept in the attach files...

 

[SoNic_real_one]

You "de-jitter" only clock. But the data has the same jitter. Jitter comes from the mechanical process of reading of the optical disc, not from the clock itself.

Replacing the jittery but syncron clock with another one "clean" but with different instantaneous frequency from the data (even if long-term would be the same frequency), would make data samples to be skipped or repeated periodically.