| 摘要 |
PROBLEM TO BE SOLVED: To obtain an audio signal processing device which can easily set and change tempo of music sound. SOLUTION: This device is provided with a system controller A1, a signal processing section A3 consisting of a digital signal processor, magnification specifying buttons 21-26, a mode changeover switch 27, and a tap button 28. The signal processing section A3 has a function to change tempo of an inputted audio signal Sin, when an automatic mode is set by the mode changeover switch 27, the number of beats and a period of the beat are automatically calculated from the audio signal Sin. On the other hand, when a manual mode is set, the number of beats and a period of the beat are decided by a depressing period of the tap button 28. Fixed magnification for changing a period of the beat previously is allotted to magnification specifying buttons 21-26, by turning on these magnification specifying buttons 21-26, a period of the beat and the number of beats set by an automatic made or a manual mode are directly changed, tempo of music sound can be set and changed. |
