Fourier SynthesizerÖ.. produces frequencies
f1 , 2f1, 3f1, 4f1, 5f1 6f1, 7f1 etc
of adjustable amplitude and phase .
e.g. f1 = 440 Hz = A4 can synthesize any 440 Hz wave shape.
Fourier AnalyzerÖ.. shows graph of Fourier spectrum
(amplitude and frequency of sine wave components)
of periodic wave (voice or instrument)
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