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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: Upsampling question posted by cpcat on November 10, 2007 at 16:18:35:
Oversampling: This is one of the first technologies used in reconstructing sound - by doubling or quadrupling (or more) the effective sample rate - you move the aliasing artifacts far enough up in frequency that you can use a very gentle filter to get rid of the aliasing that will have minimal impact upon the desired signal.
"Everyone uses it" in a conventional CDP. And when you say you don't like "upsampling" then you are saying you prefer this, older method. Nothing wrong with that.
When you oversample - you need to make sure the DAC can handle the effective higher rate. So that would be a practical limitation of the technique.
With upsampling you are converting the # of bits and the bit rate - though the bet you are placing is that the errors from that conversion are lower than the errors you will experience with a more conventional technique. ONe can argue if doubling the bits and quadrupling the sample rate or doing it asynchonously is better - it will all boil down to the algorithm and interpolation math - since both would have to be interpolated! Personally, I think the less upsampling one has to do - regardless of whether it was interger or not - the less work an algorithm would do - even if somehow we could say "original information" were preserved or not.
Basically - one must pick one's poison. I have owned both conventional (oversmapled) and Upsampled CD players - and the Upsampled *seem* to be more detailed (Arcam CD192). I have no idea if it is because of the conversion it is going through as the manufacturer says or that it is just a better player. Ah well, maybe I will listen to another Disc instead of wondering too much about it! :)
"Knowledge is knowing that a tomato is a fruit. Wisdom is knowing not to put it in a fruit salad"
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Follow Ups
- Over-sampling - Bromo33333 09:12:36 11/14/07 (0)
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