| The idiom is essentially tonal though dissonance, bitonality, and, occasionally, polytonality are liberally used. |
| Utilisation of the computer allowed him to develop a musical language, which is often characterised by the use of polytonality but in a very enlarged tonal writing in order to explore various sound timbres. |
| His language, which could take very diverse forms, was characterized by the use of polytonality. |
| The effect of his polytonality is that of simultaneous movement of different planes of sound. |
| Throughout, the polytonality is permeated by the sound of the minor-ninth chord. |
| Satie was in advance of his time with his love of bitonality, polytonality and non-triadic harmony to name but a few of his gravity-breaking techniques. |
