Instruments with lower partials up to the sixth sound rich yet sweet

Evidence

  1. Musical tones, which are accompanied by a moderately loud series of the lower partial tones up to about the sixth partial, are more harmonious and musical. Compared with simple tones, they are rich and splendid, while they are at the same time perfectly sweet and soft if the higher upper partials are absent. To these belong the musical tones produced by the pianoforte, open organ pipes, the softer piano tones of the human voice and the French horn. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1494