Optically, magnetically, and/or electronically pre-recorded musical program material on Compact Discs, CD-ROMS, diskettes, cassette tapes, and microchips for use in player pianos; piano playing mechanisms comprising an electronic controller, power supply, solenoids, and printed circuit boards for operating a piano and/or converting a conventional piano into a self-playing player piano

'and/or':3,45 'board':40 'cassett':18 'cd':15 'cd-rom':14 'circuit':39 'compact':12 'compris':30 'control':33 'convent':48 'convert':46 'disc':13 'diskett':17 'electron':4,32 'magnet':2 'materi':10 'mechan':29 'microchip':21 'music':8 'oper':42 'optic':1 'piano':26,27,44,49,56 'play':28,54 'player':25,55 'power':34 'pre':6 'pre-record':5 'print':38 'program':9 'record':7 'rom':16 'self':53 'self-play':52 'solenoid':36 'suppli':35 'tape':19 'use':23

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