His many chamber works are essentially tonal, though they use many dissonant harmonies.
In the Romantic era of music during the 1800s, vocal harmonization became more complex, and arrangers began including more dissonant harmonies.
More striking is Mr. Reich's aggressively dissonant harmony and his sense of episodic movement.
Another manner of thinking about the relationship regards stability; dissonant harmonies are sometimes considered to be unstable and to "want to move" or "resolve" toward consonance.
This second theme is tenser than the first, utilizing dissonant harmonies and figures from the piano.
(In my estimation he's got it himself: he has a hard, dry touch, and lean, slightly dissonant harmonies.)
However, it also involves much slower tempos, dissonant harmonies, and more complex instrumentation-which is reminiscent of heavy metal.
And in both the solo line and the orchestra, pitches are bent microtonally, to create sour if not quite dissonant harmonies.
A long coda helps to stabilize the often dissonant and unstable harmonies of the movement.
In his early works, short breathless phrases, amorphous rhythms and dissonant harmonies were the rule.