Marchetto Padova

Marchetto da Padova (Marchettus of Padua; fl. 1305 – 1319) was an Italian music theorist and composer of the late medieval era. His innovations in notation of time-values were fundamental to the music of the Italian ars nova, as was his work on defining the modes and refining tuning. In addition, he was the first music theorist to discuss chromaticism. Most likely he was born in Padua. Little is known about his life, but he is recorded as being music teacher for the choirboys at the cathedral in Padua in 1305 and 1306