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I'm working on a project where the purpose is to enhance FFT peaks in a signal (musical instruments), by other words, reduce non-harmonic components and enhance the identified FFT peaks. So far I'm doing the following:

  1. I'm analysing the file on a frame basis and
  2. for each frame, I calculate an AR(8) model,
  3. then reduce the bandwidth for each peak and
  4. apply this as a filter to the frame,
  5. combine everything using PSOLA

The results are good but they could be better. Any ideas for a different approach?

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    $\begingroup$ wanna do it with a time-domain approach, rather than FFT? $\endgroup$ Jan 5, 2020 at 1:00
  • $\begingroup$ or use a frequency domain that is dedicatedly combining harmonics into a single number? $\endgroup$ Jan 6, 2020 at 15:01

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