all-and-response begins with a melodic “phrase.” This is a group of notes that expresses a musical idea. The phrase can be purely vocal or can be played on an instrument. It can also be a mixture of the two. For example, B.B. King was known to make the call with his voice, and answer it with his guitar.
No way you need to look at picher than answer
George Eastman introduced film roll in 1884.
