electronic systems consisting of photoelectric sensors, a computer, a sampling synthesizer, and a sound system, that cause the passage of feet in the space above the treads of a flight of stairs to be detected and a corresponding musical tone to be generated

'caus':17 'comput':8 'consist':3 'correspond':38 'detect':35 'electron':1 'feet':21 'flight':30 'generat':43 'music':39 'passag':19 'photoelectr':5 'sampl':10 'sensor':6 'sound':14 'space':24 'stair':32 'synthes':11 'system':2,15 'tone':40 'tread':27

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