rest

A rest is an interval of silence in a piece of music, marked by a symbol indicating the length of the pause. Each rest symbol corresponds with a particular note value: : The quarter (crotchet) rest may also be found as a form in older music.History of Music Notation by C. Gorden, p. 93, copyright 1937. (The four-measure rest or longa rest is a symbol found in Western musical notation denoting a silence four times the duration of a whole rest. They are only used in long silent passages which are not divided into bars. The two-measure rest or breve rest is another symbol found in Western musical notation denoting a silence twice the duration of a whole rest. The combination of rests used to mark a pause follows the same rules as for notes.AB guide to music theory by E. Taylor, chapter 13/1, ISBN 9781854724465 For more details see note value.