undetermined duration

Music by Philip Glass.
Published by Dunvagen Music Publishers.

organ

“Contrary Motion” was written in what Glass calls ‘open form’ – it never really ends. it just stops. The expanding figures upon which it is constructed could, theoretically, continue augmenting forever. — Tim Page

Music in Contrary Motion at Wise Music Classical
Music in Contrary Motion for Organ at MusicRoom.com

ECORDINGS:
Early Keyboard Music on MDG
Glass Organ Works on Catalyst
Music in the Shape of a Square on Stradivarius
Two Pages / Contrary Motion / Music In Fifths / Music In Similar Motion on Nonesuch