Occasionally the Italian word divisi (meaning divided, abbrev. Typically a section string player plays unison with the rest of the section. In orchestral music unison can mean the simultaneous playing of a note (or a series of notes constituting a melody) by different instruments, either at the same pitch or in a different octave, for example, cello and double bass ( all'unisono). Several singers singing a melody together. "Twinkle, Twinkle, Little Star" melody doubled in four octaves. So a unison is only the beginning of consonance or interval it is neither consonance nor interval, for like the point it is incapable of extension. But a line is not composed of points, since a point has no length, width, or depth that can be extended, or joined to another point. A point is the beginning of a line, although, it is not itself a line. However, the unison was questioned by Zarlino as an interval for lacking contrast and compared to a point in geometry:Įquality is never found in consonances or intervals, and the unison is to the musician what the point is to the geometer. The unison is also the easiest interval to tune. The unison is considered the most consonant interval while the near unison is considered the most dissonant. These waveforms have the same fundamental frequency but differ in the amplitudes of their higher harmonics. Voices with different colors have, as sound waves, different waveforms. come from different musical instruments or human voices. This is because a pair of tones in unison come from different locations or can have different "colors" ( timbres), i.e.
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