PIANO ACTION MAGNETIC TAPE RECORDING PROCESS FOR PLAYER PIANO PLAYBACK

摘要

A PIANO ACTION MAGNETIC TAPE RECORDINGPROCESS FOR PLAYER PIANO PLAYBACKABSTRACTA process is provided for recording electric signals corres-ponding to piano key operation and for reproducing the piano keyoperation. The process includes switching a discrete frequencyoscillator corresponding to each piano key, algebraically addingthe outputs of each oscillator, processing the algebraic sum ofthe oscillator outputs, recording the processed signal, reproduc-ing the processed signal, reprocessing said recorded signal,detecting each frequency in the reprocessed signal, and energizingan electromechanical device so as to actuate the piano key whichhad switched the discrete frequency oscillator.-1-