Assertion: harmony's interval | /r/CreatedBy | a pair of tones
Facets:
value: always
type: TEMPORAL
Source sentences:
text: Horizontal intervals are sometimes made by a pair of tones having unbalanced amplitudes: for example, with the clarinet the ratio of an odd overtone to an even overtone will be an interval between a loud tone and a soft tone.
text: Vertical intervals are always made by a pair of tones having balanced amplitudes: again, the amplitude variations are systematic, so the tones that are paired up vertically will have the same amplitude variations.