Jazz Open Listening Report "Don’t worry, be happy" Don’t worry, be happy was by Played by Bobby Mcferrin in the seventies . The in this piece the texture changes a lot as the work progresses. Every time the music would take a slower beat the texture would become thicker and the dynamic or the volume becomes lower. When the dynamic slows, one instrument would only be playing, and all at once when the tempo picks up more, and than three or more instrument would be playing. It seemed that when there are more than one instrument playing, they ....