does the adcom GDA-600 generate ita own clock freq

fbm211

I see a GW labs DSP is available.I want to know if the adcom generates its own reference 44.1khz clock....Explanation below...Does anyone know???????
There is another major difference between
the GW Labs and the DIP Upsampler that
Gary did not elaborate on: The GW Labs retains
the original Red Book standard frequency
of 44.1kHz. The DIP Upsampler “upsamples”
this frequency to 48kHz (hence the
name). On DACs that generate their own
44.1kHz reference clock instead of recovering
the clock from the data stream, the DIP
Upsampler obviously will not be as compatible
as the GW Labs, due to a discrepancy in
clock frequencies. A user should base his
purchase decision on whether he wants a little
“upsampling” (from the DIP Upsampler),
or whether he wants a precision clock to replace
the re-covered clock (as provided by the
GW Labs’ DSP). Either way he can expect a
significant sonic improvement. ❖

Systems

It's been a while since Ive seen the schematic for a 600 but I believe it uses the Crystal CS8412 input reciever and I don't remember seeing a separate crystal oscilator for reclocking.So it likely uses the recovered clock from the transport.The GW Labs uses a CS8420 sample rate converter IC that can upsample the data to 96k but the CS8412 in the 600 won't accept anything over 48k so that feature wil not be useful,but the units jitter reduction may be benificial.

fbm211

Well then perhaps a monarchy dip combo that upsamples to 48k would be a better mach if the 600 will accept a 48k signal.Im am also considering a Camelot Technology Dragon Pro2 Mk3 -24 /96/5.1/ac3/dts jitter reducer.Do you know anything about that unit GV? Link>http://camelottechnology.com/electronics/dragon2mk3.html

Systems

Thanks for posting the schem,indeed it does use just the CS8412 input reciever(no reclocking).IMO upsampling to 48k won't gain you much but the reclocking that occurs with the sample rate conversion process will provide a reduction in jitter. I have heard of Camelot(now defunct?) but know little about their products.The unit you linked to appears to be very similar but a newer version of the Audio Alchemy DTI units.Basically it looks like it utilizes an updated version of the CS8412,the CS8414.
All the units you are considering will reduce jitter but its hard to predict the audible improvements any of them will provide.I personally like the GW labs unit because of it's ability to upsample to 24bit/96k.This could be handy in the future if you upgraded to a DAC that could process 24/96 data.

fbm211

It seems there are two GW labs DSPs out there.Here is one that can do 192k.
Link>> http://www.audaud.com/audaud/APR02/EQUIP/equip2APR02.html

Systems

I was not aware of the 192K version.It must be a redesign with a different SRC chip as 96k is the highest the chip in the other will upsample to.