| 摘要 |
<p>A tempo detector comprising a section for inputting a sound signal, a scale sound level detecting section for determining the sound level of each scale at every predetermined time interval by performing an FFT operation on the sound signal, a section for detecting average beat interval and the position of each beat by summing up increments in sound level for all scales and determining the total increment in level indicative of the degree of variation in all sounds at predetermined time intervals, and a section for detecting the rhythm and the position of a bar line by calculating the average sound level of each scale for every beat and summing up an increment in average level for the sound of all scales thereby determining a value indicative of the degree of variation in all sounds for every beat, wherein average tempo and accurate position of beat of the entire melody, rhythm of the melody and the position of first beat can be detected from an inputted sound signal.</p> |
