Here are entered musical works not in a specific form or of a specific type in which glass is used in various ways to create musical sounds. Music for specific instruments made only of glass are entered under headings that include the name of the instrument, e.g., Glass harmonica music; music for other instruments that may be made of glass or other materials is entered under headings that include the generic name of the instrument, e.g., Flute music; Marimba music.