| 摘要 |
PROBLEM TO BE SOLVED: To provide a musical instrument sound separation device and a program, which improve accuracy in separating and extracting musical instrument sound from mixed sound.SOLUTION: In a sound source separation processing, a corresponding range corresponding to a specific sound range is specified, where a correlation value of a spectrum amplitude value ntsp(twi, fi) which is derived from one specific sound, with a spectrum amplitude value tusp(twi, fi), becomes the maximum. An amplitude ratio kr is derived in the specific corresponding range, and the derived amplitude ratio kr is multiplied by the spectrum amplitude value ntsp(twi, fi), and thereby, a separation spectrum for expressing a complex spectrum of the musical sound at musical instrument sound transition, corresponding to the specific sound, is derived (S310). Inverse Fourier transform of the separation spectrum is performed and a section transition is derived (S320). The musical instrument sound transition trwf is newly updated by replacing the corresponding range in the musical instrument transition trwf, in the derived section transition (S330). |
