♠/Slide whistles and harmony/3-2 ratio

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1.52_versus_1.50 resonance.png

Idea for explaining this[edit | edit source]

Explain the 1.5 versus 1.52. Why 1.5 is "exact" the other is "approximate".

The two graphs are similar. But the exact ratio (of frequencies) is periodic, meaning that an exact repetition of the signal occurs at exact time intervals.