| 摘要 |
An apparatus for inputting musical sheet data into a musical-sheet-printing system has a piano keyboard which has diatonic tone keys and chromatic tone keys and which generates first coded data, a function keyboard, a random access memory (RAM) for storing coded data supplied from these keyboards, a read-only memory for storing a permanent program and a conversion table representing a relationship between tonality values and chromatic tone pitches, and a control unit, under the control of the permanent program, for presetting a predetermined number of note data for the coded musical data, storing in the RAM the respective musical data included in the predetermined number of note data, accumulating the respective note data, calculating the respective entropy data in accordance with the accumulated musical data, selecting a tonality value having a maximum entropy, and determining an accidental and a note in accordance with the selected tonality value with reference to the conversion table. A method of entering note data in the musical-sheet-printing system has a step for receiving pitch data, a step for sorting and accumulating them in accordance with the number of times of occurrence thereof, a step for classifying pitch data of all scales into 12 groups, each scale having 7 pitch data and generating the 12-grouped pitch data, a step for calculating entropies of 12 groups in accordance with an equation <IMAGE> (H: entropy; Pi: probability of the number of times of occurence) and selecting a maximum entropy, and a step for determining the corresponding accidental and tone in accordance with the conversion table. |
