Guido d’Arezzo introduced a system for notating music: ut, ere, mi, fa, sol, la (the seventh note, B, is missing); Guido d’Arezzo, as a mnemonic aid for the various pitches of the scale, suggested his singers use the first stanza of Paul the Deacon’s hymn to Saint John, using the first stanza of each line: UT queant laxis – REsonare fibris – MIra gestorum – FAmuli tuorum – SOLve polluti – LAbii reatum – sancte johannes; the B was added later, towards the end of the 15th century by the Spaniard Bartolomeo Ramos de Parej; finally, in the 17th century, the Ut (which is still used in France today) became C for us, thanks to Giovan Battista Doni.
