| A | B |
|---|
| Polychord | placing two traditional chords against |
| Fourth Chord | chords based on interval of 4th |
| Tone Cluster | chord made up of half or whole step |
| Polytonality | use of two or more keys at one time |
| Bitonality | two different keys used at one time |
| Atonality | absence of tonality or key – 12 tone |
| Polyrhythm | 2 or more simultaneous rhythms |
| Ostinato | a figure or musical sentence that repeats continuously. Its length varies in scope from a motive or phrase to a period. An ostinato provides unifying repetition |
| Twelve-tone System | no one tone can be repeated until all eleven others have also been heard |
| Neoclassicism | twentieth-century trend, particularly current in the period between the two World Wars; |
| Primitivism | deliberate evocation of primitive power through insistent rhythms and psoundsercussive |
| Consonance | constant rhyme, harmonious |
| Dissonance | a simultaneous combination of tones conventionally accepted as being in a state of unrest and needing completion |
