Changes

Notes may be ''accented'' at any time. In fact, often the accent will fall on the weak beat and make the beats seem to sound out-of-sequence. The result is ''syncopated'' rhythm.

Notes may be ''accented'' at any time. In fact, often the accent will fall on the weak beat and make the beats seem to sound out-of-sequence. The result is ''syncopated'' rhythm.

The genre of music called [[rock and roll]] features a unique rhythm convention: the ''backbeat.''<ref>[http://www.tbray.org/ongoing/When/200x/2003/12/07/RockRules Normative Backbeat] at Tbray.org</ref> This is a third beat, in four-quarter time, that is stressed even more strongly than the down beat. This produces a profound sense of restlessness in the listener.

Some sub-genres of [[rock and roll]] feature a ''backbeat.''<ref>[http://www.tbray.org/ongoing/When/200x/2003/12/07/RockRules Normative Backbeat] at Tbray.org</ref> These are the second and fourth beats, in four-quarter time, unstressed in classical usage, which become stressed even more strongly than the down beat. An especially prominent backbeat is a defining feature of reggae and ska music.

== Types of instruments ==

== Types of instruments ==