Songs and music have a specific historic function. If we are not able to recall the timeline of some events of our life, we refer to songs at that time and , all the memories come back with a time range . this is great. These days when I listen to some song, I instantly recall about the time when this song was hit, and I remember teh time of my life like if I was in school or college , the grade I was in and some other related memories of that specific period.