Cadences often include (and may be emphasized or signalled by) a change in the prevailing rhythmic pattern; in such cases the final note of the cadence is usually takes more time (a longer note value, or followed by a rest, or both), and within a piece of music the cadences (and the notes near them) may also share a rhythmic pattern that is characteristic of the cadences in that piece. This choicemethod of some distinctive rhythmic pattern forending a cadence,phrase especiallywith whensome repeateddistinctive throughoutrhythmic a piece,pattern has been called a "rhythmic cadence"; rhythmic cadences continue to function without harmony or melody, for example at the ends of phrases in music for drums. Some styles of music rely on frequent regular rhythmic cadences as a unifying feature of that style.<ref name="B&S 91"/> The example below shows a characteristic rhythmic cadence (i.e. many of the cadences in this piece share this rhythmic pattern) at the end of the first phrase (in particular the last two notes and the following rest, contrasted with the regular pattern set up by all the notes before them) of [[Johann Sebastian Bach|J.S. Bach]]'s [[Brandenburg Concertos#No. 3 in G major, BWV 1048|''Brandenburg Concerto'' No. 3]] in G major, BMV 1048, mvmt. I, mm. 1–2:
