Encyclopedia
gamut
in music, the full range of pitches in a musical system; also, the compass of a particular instrument or voice. The word originated with the medieval monk Guido of Arezzo (d. 1050) to identify his system of solmization, i.e., of using syllables to denote musical tones in a scale. Thus, to render in syllables the six tones of the hexatonic scale that prevailed, Guido started with the lowest tone recognized in medieval music theory, the second G below middle C, or gamma. For this note he selected the syllable ut from the hymn "Ut queant laxis" and for the ascending tones used the syllables re, mi, fa, sol, and la. Since Guido and his successors conceived musical theory in terms of overlapping hexachords rather than the diatonic scale, the syllable ut could represent any of the three pitches capable of sustaining the overlapping hexachords that made up the system; these were C, F, and G. While ut might vary, there was only one gamma-ut.
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