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In Reply to: RE: No posted by Thorsten on June 14, 2015 at 21:14:26
Here's what ARC says in its website "The CD3 will not play back DVD video, DVD audio or SACD-only discs because it is our firm belief that the convenience of multi-format playback sacrifices sonic performance in the CD format. And, most customers and music lovers have extensive CD-based collections that continue to grow, so the priority on playback quality in this format, in our view, is eminently justified. While using the latest 24/192-capable Crystal DAC, the CD3 does not upsample, because our empirical research shows sonic compromise is unavoidable due to sample rate manipulation and approximating errors.The engineering focus of the CD3 is to maximize performance with the prevailing music format by keeping the overall player design simple, reliable and optimized for the one task it must accomplish.
My understanding is; NOS means no up, down or over sampling, which ARC CD3 is according to its write up. But, I could be wrong. However, in any case it sounds wonderful.
If a thing's worth doing, it's worth doing well
(Proverb)
Follow Ups:
Not everyone lumps the two together. It is possible for a CD player to use "oversampling" but not "upsampling" (and visa-versa), right?
Edits: 06/15/15
Thierry Heeb has conveniently omitted the key sad reality of asynchronous upsampling....
The output clock might "improve" jitter performance, but amplitude errors are introduced at the conversion as a result of precisely sampling a signal that happens to be shifted in time. And these amplitude errors then become permanently embedded in the converted digital signal.
As it's being pointed out by Thorsten's technical post below.
If a thing's worth doing, it's worth doing well
(Proverb)
Hi,
I believe ARC referred to the absence of an asynchronous sample rate converter (upsampler) which was fashionable at the time in front of the DAC.
If the information on the net is correct the CD3II uses the CS4396 (if not, little worry there is little fundamental difference between the way the CS DAC Chips function).
http://www.cirrus.com/en/pubs/proDatasheet/cs4396.pdf
To quote from the datasheet:
"The CS4396 is a complete high performance 24-bit 48/96/192 kHz stereo digital-to-analog conversion system. The device includes a digital interpolation filter followed by a oversampled multi-bit delta-sigma modulator"
To be more precise - internally this chip will first apply 8 Times oversampling to CD Data and then truncate this data to the lower wordlength (about 3.5 Bit if memory serves) while oversampling again by a factor of 16.
So combined the Oversampling factor is 128 Times oversampling.
Ciao T
At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to untolerable pain. Really, what more could we need?
.
If a thing's worth doing, it's worth doing well
(Proverb)
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