Every Shape Is Secretly a Wave - Part 2 (20 New Shapes)

Every shape is secretly a wave — trace its outline, let the height drive the pitch, and listen. Vol. 2: twenty new shapes, including a gear, a spirograph, a crescent moon… and a cat. Which shape should be in Vol. 3? Comment it — the most-requested shapes get made. Vol. 1:    • Every Shape Has a Sound   Chapters: 0:01 - Ellipse 0:15 - Pentagon 0:26 - Cardioid 0:39 - Diamond 0:52 - Crescent 1:04 - Pentagram 1:16 - Egg 1:28 - Cross 1:41 - Nephroid 1:53 - Hexagon 2:05 - Teardrop 2:17 - Hexagram 2:30 - Squircle 2:42 - Epicycloid 2:54 - Arrow 3:07 - Reuleaux Triangle 3:19 - Rose where k = 7 3:31 - Gear 3:43 - Spirograph 3:56 - Cat's Head