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A computerized piano training system is discussed here. It consists of a keyboard adaptor quasi-fixed in a piano, a micro-computer, and a TV monitor fitted with it. The system permits detecting time when a learner depresses a keyboard, processes the data, and evaluates the playing. The data and the evaluated information are displayed graphically on a TV monitor. Considering that a fundamental etude is essential as an educational material and that physical measure of the playing of an etude is considered to be more significant than that of popular musical compositions, we designed the system focusing on the playing of fundamental etudes such as “Hanon.” With the system, we obtained data on about three hundred learners. Thus, it became clear that the playing of the Hanon Etude can be classified into three kinds of typical patterns.

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