Marchetto da Padova (1274–1400)
Born 1274 CE, died 1400 CE.
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.
Text from the Wikipedia article Marchetto_da_Padova, licensed CC BY-SA 4.0.