Research Article

Some Computational Aspects of the Brain Computer Interfaces Based on Inner Music

Figure 3

An example of spectrogram feature profiles, magnification of details in the Figure 2, the local neighborhood of c2 and g2 (shown up-787 Hz)—externally played on little organ; both tone profiles show the tonal time stability, but both have spectral width of 15 Hz, while the frequency structure top is stable and reasonably narrow.
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