You have a waveform with lots of little square steps in it. Those steps contain high frequencies in the same way a square wave does. Dynamic range is determined by the number of bits used to encode the signal, and the signal/noise ratio, not the sample rate.
Martin On Fri, May 15, 2015 at 1:18 PM, Alexandre Torres Porres <[email protected]> wrote: > Howdy, I have a patch attached to show how downsampling produces > artifacts/distortion for a 440 sine wave. I don't hear "aliasing" and I > think it couldn't be foldover at all because 440 is below the nyquist. > Moreover, I hear harmonic higher pitches - so it seems like a harmonic > distortion from the original sine wave that I can also still perceive. This > kind of distortion happens when you have a reduced dynamic range. > > Another things is that I heard someone saying how increasing sample rate > improves dynamic range, but I can't find this information around. Not sure > it it's really true, if someone says it is so, please send me a source, ok? > But the thing is that the artifacts from this patch could be the result of > a smaller SNR. > > Hope you can help me sort this out. > > thanks > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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