The closest thing that I can say among all of these answers would be improvisation. The definition of improvising is adapting to the situation in a better manner appropriately. So let's say when a musician is already on stage and makes a mistake while playing the guitar, he has to improvise a bit so that his mistake will not look like one. He is spontaneously creating something while he is on the spot. In a sense, he is improvising his original work and making something somewhat different.
Rock and roll is a style of popular music that originated from the U.S in the mid-1950s, and by mid-1960s it had developed to an international style known as rock music, though the latter continued to be, rock and roll or rock 'n' roll or rock & roll. The music is associated with performers like Little Richard, Chuck Berry, Buddy Holly and the early Beatles. Instrumentation and arrangements are simple: three or four instruments, and, mostly the same number of cords while horns and strings and back up singers can be added.
1. Bel canto
2. Grand opera
3. Verismo
4. Tragedie en musique
5. Opera comique
6. Opera buffa
