What is the musical instrument XXX was intended for?
Ludus Tonalis
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.
piano