curlymorphic
commented
4 years ago @mattcollier
I have spent some time looking into this, I have added an additional source and delay to your patch that may aid in demonstrating
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The harmonic content is driven by the input source. The FM-OP does have a lot of high frequency energy, when this is passed into the delay buffer, only one wavelength long, this is then looped, causing harmonics. I have added an evenVCO as this has a much cleaner but not perfect sin output, this results in far fewer harmonics.
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Karpus-Strong synthesis is intended not to have a continuous input, but to be excited by a short burst of noise to represent the plucking of a string, with this intended use case the buffer should contain many frequencies, that when looped will form harmonics
I feel the current behavior with regards to this issue is as intended, however, I also agree that it should respond in a sensible manner when being used with all input sources. I feel that the use of a continuous signal is a creative manner for generating sounds, that producing sporadic harmonics, that are somewhat pleasant in nature and intune with they pitch set in KS Delay to be acceptable.
I would be very interested in your thoughts on the matter.
mattcollier
@mattcollier reported in #15
As I was writing this up, I was listing to the patch and noticed that there is some intermittent harmonics changes that are audible and visible on the scope. I don't know if this is a feature or a bug.
change_tune_2.vcv.zip