The rhythm section, playing with the soloist, drops out for 2 measures. this is called A solo break in jazz occurs when the rhythm section (piano, bass, drums) stops playing behind a soloist for a brief period, usually two or four bars leading into the soloist's first improvised solo chorus (at which point the rhythm section resumes playing).
A rhythmic ostinato is a brief rhythmic pattern that is continuously played. Ostinatos first emerge in Western music composition in the 13th century, as as in Cristóbal de Morales' motet Emendemus in Melius (Let Us Change for the Better).
Harmony is the simultaneous and harmonious playing of two or more notes, as well as the arrangement of notes into chords and chord progressions.
The drummer will frequently add a repetitive rhythmic pattern on the ride cymbal (sometimes referred to as the ride pattern) on top of the walking beat and backbeat. His left hand is free to play the snare drum with delicate accents.
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