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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: RE: No posted by kootenay on June 14, 2015 at 21:49:46:
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.
Thor
At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?
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Follow Ups
- RE: No - Thorsten 21:58:08 06/14/15 (1)
- Thanks for the info...nt - kootenay 22:05:40 06/14/15 (0)
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