WHAT IS THE
DURATION?Duration is the quality that lets you know how LONG or SHORT a note sounds.
IN PHYSICS It depends on the LENGTH of the vibrations.
Short sound: few seconds
Long sound: a lot of seconds
IN
MUSIC WE NEED:
NOTE LENGHTS (semibreves, minims, crotchets, quavers, semiquavers...)
RESTS 
TIME SIGNATURES, BAR, BAR LINES, TEMPO...
TIME SIGNATURES, BAR, BAR LINES, TEMPO...
With the combination of different note lengths and silence we can play a RHYTHM
The METRONOME is used for beating precise durations
