| 摘要 |
Disclosed herein is a signal processing apparatus, including: extraction means for extracting feature quantity indicative of characteristics of sounds of different tones of the 12-tone equal temperament within a predetermined range of a sound signal, the sounds being arranged in an order of a musical scale with reference to a reference sound which is a sound of a predetermined tone; and root decision means produced in advance by learning regarding the feature quantity for deciding whether the reference sound is a root from the feature quantity. |
