Two files compare four options for the top note of the Barbershop chord with the bottom pitch at 440 Hz. The first is 10 cents flat, the second is 10 cents sharp, the third is exact at 770 Hz, and the fourth is equal tempered and given by $440\times 2^{10/12}$.

Two files compare four options for the top note of the Barbershop chord with the bottom pitch at 440 Hz. The first is 10 cents flat, the second is 10 cents sharp, the third is exact at 770 Hz, and the fourth is equal tempered and given by $440\times 2^{10/12}$.