I remember everything about the movie except the name. The hero/protaganist is a struggling musician who lives in the suburbs with his wife. This is around the 1950's. To make ends meet, he takes a summer job in the local college/university to teach music to students . One thing leads to another and he becomes permanent staff. He is a bit of rebel and he motivates students by letting them hear rock and telling its classical history. He asks why they like a particular song and it is made clear because it is a simple rythmm to catch and it goes on and on.
After his child is born, pretty early it is diagnosed that the child is deaf. Times change (1960's now) and things comes to a head when one night our musician comes to know that one of the beatles is dead and he becomes sad or is mildly depressed. He thinks the son wouldn't know what significant role the Beatles played as a group in society as well as specifically in music.
The son with help of mother uses sign language to tell that he knows what they stood for. Later the musician makes up to the son by making a song and dedicating it to his son in public and calling him 'Sweet boy' and taking his name.
At the end of the movie, he is ambushed where all students from his years come and do his musical classical music piece that he has been composing over the years.
Does anybody know the movie I'm talking about?