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Hello and Welcome!

My goal is to add specific harmonics to guitar signal and also i want to be able to manipulate a magnitude of existing harmonics. My first attempt was achive it by using FFT getting right bins of some freqs boost it and go back to time domain with IFT (and i was able to do this but there always were some artfiacts) but i couldnt add some harmonic using this method. So here is my question: which way is more afficient and also easier to implement to add harmonic to the signal - addtive synth (adding some sin waves to the original signal) or Harmonic Generation through Frequency Shifting? Or maybe there is another method which is better?

So for example i play note A4 which is 440 Hz and i want to add to the signal a harmonic 660 Hz which does not naturally occur in this sound.

Also if addtive synth is the way should i choose Wavetable synthesis or sine wave synthesiser?

Thanks in advance! Have a great day!

I tried to achive my goal by FFT boosting some specific freqs and IFT to time domain. But i got some artifacts in signal.

463035818_is_not_an_ai
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barto
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  • Look into non-linear transforms. For example, squaring a signal doubles the ground frequency, and (soft-)clipping and reflecting are also popular methods to generate harmonics, especially with electric guitars. (Btw, 660Hz is not a harmonic but a perfect fifth) – Mark Jeronimus Aug 05 '23 at 22:30
  • Look into Sound Synthesis (FM) – Michael Chourdakis Aug 20 '23 at 03:32

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