Michel Cals (b. 1951) composed his Four Inventions for Percussion and Piano to be played in a competition at Paris Conservatoire. As an unusual, contemporary addition to the Percussion repertoire, this Cals piece is a must-play for percussionists wishing to broaden their style.

The four pieces bear the name of their instrumentation; 1. Accessories and Vibraphone, 2. Xylo-Marimba, 3. Snare Drum and Drum Kit, and 4. Five Timpani. Exploiting Percussion to its full potential, Cals' Four Inventions is essential to the repertoire of advanced percussionists.