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Music which accompanies singing.
A Cd where a pro records themselves so others can play or sing along.
The accompaniment for most waltzes is in three-quarter time (3/4) where there are 3 beats to each measure and the quarter note receives one beat.
Accompaniment tracks are recorded backing tracks that help people to prepare for music exams or performances and can be downloaded from sites like http://www.exam-accompaniment.co.uk/