Sensthethesia

Here is a demonstration of what square waves look like.

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This is a stereo square wave(phase difference 90 degrees). It should be a square on the X-Y plotter.

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Here is a chord of square waves. Notice the “constructive interference” as more notes are brought in. One note plots 1^2=1 squares, Two notes plots 2^2=4 squares, Three notes plots 3^2=9 squares, and so on. So it’s N(#notes) squared! Playing certain chords will trace only certain parts of the squares depending on their harmony.