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In Reply to: RE: Chord up-samples? posted by yage on June 20, 2017 at 12:26:25
"Oversampling filters 'create' new samples of the original signal. I think this is what Franks is alluding to."Franks used the phrase "faithfully reproducing all of the timing information"..... Oversampling cannot provide or improve this. And most DACs in existence already oversample/upsample. This is nothing new. This is why I thought Franks implied that DACs omitted some of the samples from the original data.
The "creation" of the samples is the execution of the digital filter function in the time domain. Once again, nothing new.
Edits: 06/21/17Follow Ups:
Again, if you read what the Chord DAC design has written, he believes that humans are very sensitive to small timing errors and using a very long FIR filter is the way to reproduce the sample without a timing error compared to the original sampling point from the ADC. So, yes, nothing really new Chord just take filter length to the extreme but the minimum phase filter has become popular which is almost the exact opposite.
But the original question was really whether Chord uses two clock sources for 44.1x & 48x data and we still didn't answer him.
13DoW
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