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 <porres@gmail.com> 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

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