| 摘要 |
PURPOSE:To reduce the consumption for a memory and to improve the response and speediness by reading arithmetic contents for realizing a selected pitch group and performing arithmetic corresponding to the arithmetic contents, storing the arithmetic result, and reading the arithmetic result out every time a pitch is specified. CONSTITUTION:Tuning data TU which is preset in a counter 9 with tuning keys 3 and 4 is processed by a CPU 8 and written in a tuning area of a work RAM 13. The data TUt after the arithmetic processing indicates the ratio of frequency variation under tuning control. Then the CPU 8 multiplies frequency numbers FD of all 88 keys by the variation rate data TUt and corrects the value each frequency number FD corresponding to the tuning control. The arithmetic result is read out every time a pitch is specified. Consequently, the memory consumption becomes small and the response and speediness are improved. |
