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The band tapped Pope, a former champion on “The Voice,” to lend a harmonic tone to the country-pop duet and neither disappointed.

The following year, the equally ill-fated Amectran Exar-1 boasted "a noise generator that emits a harmonic tone at speeds under 30 mph."

It is, as he once described it, a sonorous, harmonic tone resembling the after-ring of large bells.

Two-thirds of the length of a string when stopped produces a tone a fifth higher than that of the entire string; one-third of the length of a string on the violin, either from the nut or from the bridge, if touched lightly with the finger at that point, produces a harmonic tone an octave higher than the fifth to the open tone of that string, because you divide the string into three vibrating segments, each of which is one-third its entire length.

For illustration, if the string be tuned to 1C, the harmonic tone produced as above will be 2G.