Melody, tonality, rhythm and orchestral timbres work together to form an indivisible whole. Its piano, violin, flute and guitar timbres were nearly unrecognizable abstractions of real instruments. Most digital pianos can produce a variety of different piano timbres. Zappa pioneered the use of tape speed manipulation to produce unusual timbres and tonal colors. This can create smooth, evolving timbres, or rhythmic effects. Like many analog synthesizers, it was much better-suited to producing "otherworldly" timbres. Register switches select combinations of reed ranks to produce contrasting timbres. Two main contrasting vocal timbres are heard in this song. The synthesizer also increased the amount of timbres and effects available. It utilizes several wavetables and oscillators in the creation of synthetic timbres. Her compositions blend the timbres of world music with her native Japanese culture. They emphasized emotional intensity and sound for its own sake, exploring timbres. To facilitate a large range of timbres, organ stops exist at different pitch levels. The layering of contrasting timbres is characteristic of the piece as a whole. Penderecki delineates each section through a system of contrasting timbres.