13 March 1595 – 1647) was an Italian musicologist and humanist who made an extensive study of ancient music.
He is known, among other works, for having renamed the note "Ut" to "Do" (in the "Do Re Mi ..." solfège scale).
In his day, he was a well-known lawyer, classical scholar, critic and musical theorist, and from 1640 to 1647 he occupied the Chair of Eloquence at the University of Florence and was a prominent member of the city's Accademia della Crusca, one of the early semi-scientific/academic societies that flourished in Italy at the time.
They had published the first Italian-language dictionary in 1612.