GASSTOUE, Amédée. — Musicologist and musician, b. in Paris on 13 March 1873, d. there on 27 July 1943. A pupil of the Conservatory, he later served as chapel master in the church of St John the Baptist at Belleville and as a teacher of Gregorian chant.
Besides numerous articles in various journals, he wrote works of musical history of great importance, albeit in part controversial, the fruit of deep study and research in French libraries: *Histoire du chant liturgique à Paris* (1 vol. up to the Carolingian era, Paris 1904); *Le drame liturgique* (ibid. 1906); *Les origines du chant romain*; *L'antiphonaire grégorien* (ibid. 1907); *Le grutnel et l'antiphonaire romain, histoire et description* (ibid. 1813). He also published liturgical chants and theoretical works, transcriptions of ancient liturgical chants.
He was a member of the Pontifical Commission for the Vatican Edition of liturgical chant books, but his theories on Gregorian rhythm did not coincide with those of the Solemnes School of Marquemont.