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stairs.readme
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1988-03-17
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842b
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26 lines
Magic Staircase by Gary Cuba (803)776-5295 -- developed
1/31/86. All copyrights waived, but mention the author!
Will the tones ever stop ascending?
NOTE: This program requires the file tone1
This is a musical illusion based upon perceptual circularity
of widely space tones whose volumes are defined as a
sinesoidal relationship TO their frequency.
There are 4 tones spaced an octave apart. each tone advances
in frequency by one half-note until it is within 1/2
note of the NEXT octave. at this POINT it starts over
again at its beginning frequency.
Each tone's volume is set according to its position along a
sinewave.
See Roger N. Shepard, 'Circularity in Judgements of Relative
Pitch', The Journal of the Acoustical Society of America,
(December 1964).