TUNING_FOR_EQUAL_TEMPERAMENT

Published:2009/7/2 0:39:00 Author:May | From:SeekIC

Instrument described enables anyone to tune such instruments as organ, piano, and harpsichord in equal temperament with accuracy approaching that of professional tuner. Only requirement is ability to hear beats between two tones sounded together. Master oscillator circuit shown generates 250.830 kHz for feeding to first of five ICs connected as programmable divider that provides 12 notes of an octave as 12 equal semitones differing from each other by factor of 1.0594. Article gives suitable power amplifier to fit along with divider connections and detailed instructions for construction, calibration, and use.-W. S. Pike, Digital Tuning Aid, Wireless World, July 1974, p 224-227.



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