| 摘要 |
An automatic performance apparatus for use in combination with a manually operable musical tone generating instrument. The automatic performance apparatus includes a tempo signal generator, a reference timing signal generator, a tempo setting circuit and a tempo controller. The tempo controller measures the number of manual operations of the manual tone generating instrument in respective predetermined intervals before and after generation of the reference timing signal from the reference timing signal generator. The generation of the tempo signal from the tempo signal generator is controlled in accordance with the measured number obtained from the tempo controller, so that the tempo of the automatic performance is controlled.
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