Created
May 31, 2024 01:57
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| const noteToHz = note => 440 * 2 ** ( | |
| ("C-D-EF-G-A-B".indexOf(note[0]) + (note.match(/#/g) || []).length - (note.match(/b/g) || []).length - 9) / 12 | |
| + (Number((note.match(/\d|-/g) || ['4']).join('')) - 4) | |
| ) | |
| noteToHz.validate = s => /^[A-G][#b]*-?\d*$/g.test(s) |
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