WEBVTT

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(Johan Sebastian Bach - Goldberg Variations, BWV 988: i. Aria - Glenn Gould (1981)

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(Horizontal Scale: logarithm of frequency (from 2 octaves below middle C to 3 octaves above it)

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(Verical Sale: square root of mean intensity - A = 440 Hz (equal temperament assumed) )

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( http://www.youtube.com/user/inwit )