Follow 
  the dynamic behavior of instrument Spectral Centroid and Spectral Flux when 
  playing together in "the wild". 
  Using the colored 
    switches at the top of the screen, you can turn the various instruments 
    of the orchestra on and off. 
  The best way 
    to start is to first switch off all instruments via the "All" 
    button (far right) and start the performance with the "Play" 
    button.
  Then click on 
    the two oboes ("Ob1" and "Ob2") and then 
    gradually add more and more instruments and observe how they each occupy 
    their own quasi-demarcated areas or "territories" 
    in the Spectralflux/Centroid field.
  The closer 
    the timbres are to each other in the Spectralflux/Centroid field, the more 
    similar they should sound.