Philip Glass (b. Baltimore, January 31,1937) is an American composer. His compositions generally fall under the genre minimal music.
The following works have been added, or further subdivided:
- Metamorphosis, Nos. 1 and 5, subdivided into level 4.
- Metamorphosis, No. 3, subdivided into level 5.
- Metamorphosis, Nos. 2 en 4, subdivided into level 6.
- Wichita Vortex Sutra added to level 6.
- Mad Rush toegevoegd added to level 7.
- The Complete Piano Etudes added to level 9.