Convergence to the Golden Ratio no. 1

Casey Mongoven

March 23, 2005

 

description of piece: Fibonacci sequence used on both speakers; right speaker trails the left by 1 member of the sequence, showing how adjacent members of the Fibonacci sequence converge to the golden ratio interval in the harmonic series

number of members in Fibonacci sequence used: 9

number of intervals used: 8

temperament: series of harmonic partials

lowest frequency: 0 Hertz

highest frequency: 898.8 Hertz

length: 21.2 seconds

note value: 2.65 seconds

waveform: square 0°

pan: see sequence values

dynamic value: fff throughout

attack: .005 seconds

release: .008 seconds

 

pitches used:

 

#         frequency in Hertz     

 

0         0   

1         42.8

2         85.6

3         128.4

5         214 

8         342.4   

13        556.4   

21        898.8   

 

sequence values (harmonic partials used):

 

LEFT SPEAKER (-30°)

 

1 1 2 3 5 8 13 21

 

RIGHT SPEAKER (30°)

 

0 1 1 2 3 5 8 13

 

graph:

 

 

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