is a drawing on the narrative and drawing on themes of nature, so a great example is a piece by tadao sawai called "tori no yo ni" written in 1985. he says, "how would it feel to fly free in the sky as a bird flies? "humans have invented airplanes, but we are not free to feel the clouds as we pass through them." mr. sawai is composing a contemporary piece for koto, a traditional instrument, but he continues the tradition of writing with some expression of nature and somewhat of a narrative. [conga drumming] (narrator) one of the most common vocal and instrumental forms found around the world is call and response. call and response is both a structure and a way of performing. it relies on the regular alternation between soloist and chorus. in sub-sahara africa, it is one of the main ways that vocal music is organized. [call and response singing] (man) call and response is the lifeblood of african people. and so, for example, when we played "kakilambe," there was a call, ♪ maimbo maimbo mama maimbo kakilambe be boom be ♪ and we responded. and so, as you could see, there is a lead person singi