Digital solid state recording of signals characterizing the playing of a musical instrument
First Claim
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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Abstract
A recording and playback system for keyboard musical instruments in which data characterizing the operation of a keyboard of the instrument is recorded in solid-state memory in the form of words specifying keys to which changes of state have taken place together with data words specifying the time intervals between such changes, both types of data words being recorded in a continuous sequence of addresses in memory and the timing signals being distinguishable from the change-of-state signals by the use of pre-arranged codes, different for each type, within the range of codes available for use as data codes; such data being subsequently played back by the system in such a manner as to cause the musical instrument to reproduce the original performance.
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Citations
7 Claims
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1. A recording and playback system for a keyboard musical instrument, comprising:
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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, and playback 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification