Music sound signaling separable manner, that device and its program record media

摘要

PROBLEM TO BE SOLVED: To perform musical acoustic signal separation with high quality even in the case that the fluctuation of a musical interval and rhythm is large. SOLUTION: An instantaneous frequency component is extracted from input acoustic signals in a means 1 (3-4), the sound height of a musical note and timing information are obtained from part score information (3-2) in the meantime and the fundamental frequency track is approximated by the response of a secondary damping vibration system (3-3). It and the corresponding frequency component extracted in the means 1 are referred to and the correspondence of the fundamental frequency track based on actual input is performed (3-5). The frequency track of the fundamental waves and the instantaneous frequency at each time of the extracted component of the means 1 are referred to and fundamental frequency track components are removed in this example (3-6). For the remaining, divisional sine waves synthesized based on the time, amplitude and phase information of the extracted frequency components are added for the number of simultaneously present frequency components at each time and an acoustic signal waveform (3-7) is obtained.