Ten functions y(x) are played as pitch, f = 130.8 · 2ʸ Hz, with x advancing 2.5 units per second, so every graph is four bars of music. A kick is y = −1.6 + 5e^(−kx): a five octave jump that falls back toward 43 Hz. ⌊·⌋ snaps two sines onto steps of 7/12 of an octave, a fifth. arctan(s sin 4πx)/arctan s squares a vibrato as s climbs from 0.5 to 40, and sin(πp²/4) quickens its own notes.