Different amplitude and time distribution of the sound of light and classical music

Several pieces of different musical kinds were studied measuring A(t), the output amplitude of a peak detector driven by the electric signal arriving to the loudspeaker. Fixed a suitable threshold (A) over bar, we considered N(A), the number of times that A(t) > (A) over bar, each of them we named e vent and N(t), the distribution of times t between two consecutive events. Some N(A) and N(t) distributions are displayed in the reported logarithmic plots, showing that jazz, pop, rock and other popular rhythms have noise-di stribution, while classical pieces of music are characterized by more compl ex statistics. We pointed out the extraordinary case of the aria "La calunn ia e un venticello", where the words describe an avalanche or seismic proce ss, calumny, and the rossinian music shows N(A) and N(t) distribution typic al of earthquakes.