Ummmm.......................
It depends if it's a single or a double bar line.
if it's a double bar line it's just there to separate the sections of the music and if it's a single bar line all it does it separate the beats in order to make a measure.
Answer:
maybe i can help.....but u have to put it in ENGLISH!!!!
Explanation:
D.etching hope that helped
Strong and weak harmonic and melodic beats