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Composers have often mined the soundtrack of the streets for raw material.

John Cage wove an entire musical philosophy out of random noise.

The piece begins with a heartbeat, church bells, and clapping from a solitary pair of hands.

Sirens strike up an urgent fugue, accompanied by cheering and banging.

Doing this helped ground me, Kline says.

Kline has a long history of twining his music together with the citys.

If I had any skill at such things, Id have a go at make one myself.

That was a challenge Kline couldnt decline, and he put out a call for recordings.

Smith sent a tambourine track from Jackson Heights.

I contributed 30 seconds from my balcony on the Upper West Side.

In all, Kline got sounds from nine different spots.

The heartbeat is the only interior.

New Yorkers are good at making noise, he says.

Some of these people could almost be at a Yankee game.