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Fourier Sound Synthesis

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seconds
0.5
first frequency
440
second frequency
660
third frequency
0
fourth frequency
0
fifth frequency
0
sixth frequency
0
Mix up to six frequencies and change the duration of this synthetic sound. The phase-centered result of adding the frequencies is constructed in the Fourier domain. The real part of the inverse Fourier transform gives the graph. The sampled function is scaled for shorter or longer sounds to keep the resulting tone constant. The plot, however, shows 8192 amplitudes for all selected durations.
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