> > > > From what I understand it is impossible to get rid of aliased frequencies > > after sampling. > > > > Once a frequency component is "aliased", it loses the original identity of > that frequency takes on the identity of the alias. Then it's just a > frequency component. The reason we hear these aliases is that, if the > waveform was originally meant to be quasi-periodic (a.k.a. quasi-harmonic), > the harmonics that are folded over cease to be harmonic and we hear that. > > So any harmonics that somehow find themselves higher in frequency than > Nyquist will fold over and take on another frequency. How did they get > there? The original recorded note just had them as harmonic. It is when > notes that are rich in harmonics are pitched up to a higher pitch, that's > when folding or aliasing may happen. Is that what is happening to you? > > I was trying to answer the question implied by the thread Subject header: > "How does one generate bandlimited waveforms that can be morphed into other > bandlimited waveforms?" Is that your question, André? >
Yes, it is. I think I have enough information to try the waveform-tables approach. I will quantise the morphing waveforms and do a FFT on each to build wavetables. I looks like this is what I can accomplished with my current knowledge. Thanks for your input and insights. It is clear to me that all these problems - so easy they look at the first glance - ends up really complicated if you want to do the first thing that comes into your mind. Hope I can present the solution for you to fiddle around with online soon. Cheers! ~ André Michelle https://www.audiotool.com <https://www.audiotool.com/>
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