Canto harmonico : in cinque parti diviso, col quale si può arriuare alla perfetta cognitione del canto fermo
A 1690 Italian music treatise printed in Modena by the Cassiani heirs, teaching plainchant and solmization to singers and students of Gregorian chant. The pictures are close crops of printed staff notation: rows of diamond-headed notes on five-line staves, with clefs, accidentals and rests set in heavy black ink on yellowed paper, offering a designer a dense, rhythmic texture of repeated geometric shapes.
