Each musical note has many spectral components. They are base tone, we hear as note pitch and overtones with frequencies at 12, 19, 24 semi-tones higher than base tone. Overtones are responsible for the timbre of note. Unique set of overtones amplitude allows each instrument to have it's own musical timbre. The same instrument allows playing notes louder or quieter, but timbre does not change. The most important parameter for timbre is relative amplitude of spectral components in musical note.
Harmonic Model control allows setting relative volume of spectral components of assumed note. This tool is very helpful when you are going to recognize an extract performed on one instrument, so you can single out separate notes (for example, you have a musical extract with part of melody played without arrangement or you perform real-time recognition playing the musical instrument). In that case if you play a separate note and take a look at Spectrum window, you will see something like this:
The most left spectral maximum denotes fundamental frequency, others denote first, second, third etc. harmonics. Remember the ratio between its amplitudes and set the same ratio in Harmonics window by pressing left mouse button on appropriate bar and moving the mouse pointer. Typical harmonic picture looks like this:
Changing Harmonic Model may lead to significant increase of recognition precision when all other recognition settings are not optimized, so that TS-AudioToMIDI might skip necessary or add waste notes occasionally.
Related topics:
Spectrum Analyzer and Keyboard
Saving settings
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