abstract:Ludus Tonalis ("Play of Tones" or "Tonal Game"), subtitled Kontrapunktische, tonal, und Klaviertechnische Übungen (counterpoint, tonal and technical studies for the piano), is a piano work by Paul Hindemith that was composed in 1942 during his stay in the United States. First performed in 1943 in Chicago (Willard MacGregor).