| 摘要 |
PROBLEM TO BE SOLVED: To correctly evaluate the points by extracting the singing components from audio signals. SOLUTION: Stereophonic audio signals from input terminals 1 and 2 are supplied to vocal canceling circuit 6, the singing components located at a center are canceled by taking difference components, for example, and only accompaniment components are taken out. If the audio signals from the terminals l and 2 are so-called multiplex audio signals, these signals are selected by the contact points 'd' and 'e' of a switch 12 in accordance with the needs and taken out from output terminals 4 and 5. At the same time, the audio signals from the terminals 1 and 2 are supplied to the circuit 6, the accompaniment components of the audio signals are canceled and only the singing components are taken out. Then, the singing components are supplied to a microcomputer 8, which evalutates the singing, through a contact point 'g' of a switch 7. Moreover, the inputted audio signals from a microcomputer 9 are supplied to the microcomputer 8 and the singing of the inputted audio signals is evaluated. |
