MUSICAL PERFORMANCE TIME MEASURING INSTRUMENT FOR AUTOMATIC MUSICAL PERFORMANCE PIANO

摘要

PURPOSE:To easily and quantatively understand the maintenance and inspection time by detecting the start and the end of a reproducing musical performance, and accumulating and storing the reproducing musical performance time. CONSTITUTION:A start detecting means A detects a fact that an automatic musical performance piano P starts a reproducing musical performance, and an end detecting means B detects a fact that the reproducing musical performance is ended. Subsequently, on the basis of information obtained from the means A and the means B, respectively, the reproducing musical performance time of the piano P is calculated by a musical performance time calculating means C. On the other hand, an added value of the accumulated reproducing musical performance time of a storage means D in which the accumulated reproducing musical performance time is stored, and the calculated reproducing musical performance time is calculated by an arithmetic means E, and its added value is updated by an accumulated musical performance time updating means F as the accumulated reproducing musical performance time, and stored in the storage means D. In such a way, the maintenance and inspection time is understood easily and quantitatively, and the maintenance and inspection can be executed at an appropriate time.