Quote:
Originally Posted by Alexey Lukin  No. The overall power of harmonics is limited by the power of quantization distortion (which is independent of the sampling rate). But since they can spread to a wider frequency range, the audible power is reduced.
P.S. Dan, I hear you. I think that the original post mentioned a different type of noise: not the one from analog components, but the one theoretically achievable in a given digital audio format. |
Theoertical noise? OK. That is the easy part, just math analysis and not that high level math. But it has little practical value. You do not have 24 bits converters, the analog noise gets into the lower bits. Real life gear quantization noise is DICTATED by analog components and circuits, not by truncation of a theoreticaly perfect converter, and more bandwidth means more noise and more errors.
Indeed a theoretical converter of say only 16 bits operating at 10000 fs can yield 3dB X 100 = 300dB better noise.... All you need to do is decimate it down by 10000... That is not a higher conversion rate, this is oversampling, because that only works when the signal bandwidth is 1/20000 of the sample rate. That is all easy to understand, and I do not see much value in it. A better approach is sigma delta where the noise shaping comes into play, enabling much less then 10000 fs oversampling. I already explained about the design tradoff of a noise shaper in a previous post.
Regards
Dan Lavry