||The 27-inch Pernambuco block above the resonator gives an A, one octave above the piano's lowest A. The small redwood block in front gives an approximate C#, third above middle C. The seven brass artillery casings give a microtonal sequence from a flat C#, third above middle C, to the next D. The two cloud-chamber bowls are separated by about a semitone A -- A-flat. The whang-gun, on the left, is a piece of spring steel controlled by a pedal, and makes a 'whang" sound. The raspador is also on the left. Played with a variety of mallets.