Music is dependent on rhythm; therefore, it is very important for composers to be able to notate it accurately. Rhythm is based on 2 basic properties, tempo and time-signature. The tempo is indicated above the first staff, on the practice sheet it is written as 80 beats pr. minute, abbreviated as BPM. This tells us that there is 80 beats or quarter-notes every minute, which means that we know now how fast or slow we should play the song.
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