For instance, tabla music by Ravi Shankar and Allah Rakha that Glass knew quite well, having made a study-trip to India, then to Northern Africa and Central Asia. When all is said and done, it is freedom in sounds that is essential. No I by Sol LeWitt modify the relationship between man and object, minimalist music transforms time and duration, replacing external passive listening by internal active listening. The matter of attention is the very interior of the sound. And Glass's minimalist music gives full reign to this experience.
Metamorphosis consists of five parts.
One introduces a simple melody in the upper register accompanied by a ground bass based on alternating thirds which remain constant throughout the cycle of five movements, as well as Mad Rush and Wichita Vortex Sutra . Two uses the same writing but this time ornate with upper register arpeggios. Mad Rush and Wichita Vortex Sutra manifest more development. Wichita Vortex Sutra , the finale, uses off-beats and arpeggios similarly to Four . This composition is hymn-like while remaining faithful to the composer's style.