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Ut queant laxis

Ut queant laxis or Hymnus in Ioannem is a hymn to Saint John the Baptist written by Paolo Diacono (ca 720 - 799) of Italy. It is notable in that the first syllable of each line gave its name to a successive note of the major scale in solfege, as each line begins with the successively higher note. The lyrics are:

Ut queant laxis
Resonāre fibris
ra gestorum
Famuli tuorum,
Solve polluti
Labii reatum,
Sancte Ioannes.

(So that these your servants may, with all their voice, sing your marvelous () exploits, clean (Sol) the guilt from our stained lips, O Saint John.)

Ut is now mostly replaced by do due to the latter's open sound. Si has been replaced by ti in English.

The use of Ut queant laxis to name the notes is usually attributed to Guido of Arezzo.

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