Math rock is a rhythmically complex, often guitar-based, style of
experimental rock and
indie rock music that emerged in the late 1980s, influenced by
progressive rock bands like
King Crimson and 20th century minimalist composers such as
Steve Reich. It is characterized by complex, atypical
rhythmic structures (including irregular stopping and starting),
counterpoint, odd time signatures, angular melodies, and extended, often
dissonant,
chords.