Hover your mouse over the dot to hear each note. If you have no idea what this is, either google "microtonal tuning systems" or continue going about your business. On the right is "just intonation" which relies on harmonic intervals. Our standard 12 tone music is an approximation of just intonation, but perhaps different numbers of notes could better approximate those intervals, although it may sound out of tune if you're not used to it. This is a visualizer I made to hear and visualize how different tunings compare to just intonation and the standard 12. Conclusion: 19 is best