He cites Marchetto of Padua as the first to write in the chromatic manner since Boethius.

Bertolotti in his searching examination[7] of the records of Mantua found numerous names of musicians employed at the court or permitted to exercise their calling within the boundaries of the marquisate.

He notes the predominance of Flemish masters and the supremacy of their ideas in the music of Italy.

He attributes to Vittorino da Feltre the introduction of the systematic study of music and credits him with publicly teaching the art and inspiring in some measure the treatise of Jean le Chartreux.
From Bertolotti we learn that Maestro Rodolfo de Alemannia, an organist, and German, living in Mantua, obtained in 1435 certain privileges in the construction of organs for six years.
[Footnote 6: "La Musique aux Pays-Bas avant le XIX Siecle," Edmond Vander Straeten.

Brussels, 1867-1888.] [Footnote 7: "Musici alia Corte dei Gonzaga in Mantova dal Secolo XV al XVIII," per A.Bertolotti.