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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: this is a pretty biased description posted by tunenut on December 12, 2003 at 09:18:38:
Dear Tunenut,I agree with you in theory it should be better, unfortunately there are very good reasons why it is not the case.
It is the way these higher sampling rates are being achieved that are the crux of the problem, as the processing errors incurred when multiplying the data 512 or however many times it is done in the 1-bit bitstream delta sigma chips does not improve real resolution it just creates the illusion that it does.
This is why the A-D delta sigma type converters need all the comparators and all the "feedback" to ensure that the process does not completely run amock, I think simple logic dictates that anything which is feed back to the input is feedback designed to reduce errors, why else would it be there??
In this regard oversampling in digital serves the same function and behaves in exactly the same way as feedback does in amplifiers, it is just a different method of achieving the exact same thing, namely cheat the test equipment to think an improvement has been made.
I have checked this out, we are taking out one or more patents on an ADC, so we have had to inform ourselves in very great detail on this and related issues.
Bitstream technology has everything to do with driving down cost and nothing to do with improving quality, these days creating the illusion of an improvement is much more important that the improvement itself.
Margarine does not exist in nature.
This has nothing to do with being familiar with PCM, it has everything to do with calling a spade a spade, and like so many other issues relating to digital recording and its formats the vested interests that develop these technologies are not going to tell anyone the "truth" to them this is a question of selling more product or making more profit and since they all have far greater resources available at their disposal to cloud the issue to suit their particular agenda, they are getting away with it scotfree.
This is a well calculated commercial strategy which relies heavily on the fact that manipulating the figures and then finding a great scientific sounding explanation to something that most people do not, either understand, or have the time to get to understand fully, creates a perfect illusion.
The fact that we currently operate a belief system where higher numbers are believed to improve "resolution" regardless of how they are achieved, is enormously helpful in augmenting this strategy.
Sincerely,
Peter Qvortrup
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Follow Ups
- Re: this is a pretty biased description - Peter Qvortrup 12/13/0304:59:44 12/13/03 (3)
- thank you for your thoughtful replies - tunenut 12:29:37 12/13/03 (1)
- Re: thank you for your thoughtful replies - Peter Qvortrup 04:26:53 12/14/03 (0)
- Question for Mr. Q - rupertdacat 11:00:49 12/13/03 (0)
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