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Digital solid state recording of signals characterizing the playing of a musical instrument

  • US 4,487,101 A
  • Filed: 02/25/1982
  • Issued: 12/11/1984
  • Est. Priority Date: 10/18/1978
  • Status: Expired due to Term
First Claim
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1. A recording and playback system for a keyboard musical instrument, comprising:

  • means for providing successive outputs indicative of the state of operation of keys of a keyboard instrument whilst being played, comparison means responsive to said successive outputs for providing digital change of state signals indicative of an occurence of a change of state of key operation and defining an address representative of which of the keys has changed its state,timing means for developing digital timing signals representative of time intervals between successive changes of state of key operation, said timing signals being coded so as to be distinguishable from the change of state signals,solid state memory means operative to store said change of state signals and said timing signals, andplayback means for retrieving stored signals from the memory means, the playback means including means for distinguishing between the retrieved change of state signals and the retrieved timing signals for enabling playback by means of the keyboard instrument.

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