Figure 15

A polar representation of frequency components along an octave spacing binary spectrum for both Clarinet (a) and Cello (b) instruments. It illustrates that angular distance or in other words semitone spacing between different components in the Clarinet is almost equal and this may be one reason for significant instrument recognition of Clarinet with Smt-MF. Partials amplitudes were extracted from logarithmic amplitude FFT with a threshold at −90 dB and then were replaced with a constant value.