Automatic performance tempo control device
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorsAkira Nakada, Eisaku Okamoto, Kiyoshi Yoshida
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Abstract
A tempo control device for automatic performance according to this invention is of a type wherein a tempo of automatic performance is caused to automatically follow that of manual performance as the latter changes during performance. When difference in tempo between manual and automatic performance falls within a predetermined range, this automatic follow-up control is performed by measuring the manual performance tempo with accuracy and by controlling the frequency of tempo clock pulses in the automatic performance on the basis of the value thus measured. The predetermined range may be one fixed range for all notes of various note-lengths, or alternatively, different ranges may be employed in accordance with the length of notes.
Claims8
An automatic performance tempo control device comprising:
- manual performance signal generating means for generating a manual performance signal comprising a plurality of manual timing pulses in accordance with manual performance;
- tempo clock signal generating means for generating a tempo clock signal;
- tempo control means which receives said manual timing signal and said tempo clock signal, including judgment means for judging whether or not a pluse out of said manual timing pulses has been generated in a predetermined range around the timing determined by said tempo clock signal;
- and
- tempo control signal generating means for generating a tempo control signal in accordance with the result of the judgement of said judgement means, said tempo clock signal generating means further receiving said tempo control signal and modifying the frequency of said tempo clock signal in accordance with said tempo control signal.
Dependencies are inferred from the claim text.