John Daniel "J. D." Sumner was an American gospel singer, songwriter, and music promoter noted for his bass voice. Sumner sings the final note on the Elvis Presley song "Way Down", a C1. His vocal range extended below the lowest playable note on the piano, reaching the note G0 in a 26-second vocal slide at a concert while singing backing vocals for Presley. There are some claiming he reached an E... show more