I would like to know if pitch detection is a solved theme for an instrument like a bass (bass tones).
Is it, or there is always a percentage of error rate on the detection?
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Pitch is a human psychoacoustic perception phenomena, so an absolute ground truth might not be well defined enough to “solve”, except in some statistical sense, especially for a string bass, whose waveforms can evolve over time in both frequency and inharmonic as well as harmonic spectral composition.
A pure perfect periodicity for many natural sounds does not exist, which is likely part of what makes them interesting enough to want to hear them.