The audio signal processor, the audio signal processing method, the acoustic signal processing program, and a computer-readable recording medium recording a sound signal processing program

A frequency decomposer analyzes two amplitude data input from microphones to an acoustic signal input unit, and a two-dimensional data forming unit obtains a phase difference between the two amplitude data for each frequency. This phase difference for each frequency is given two-dimensional coordinate values to form two-dimensional data. A figure detector analyzes the generated two-dimensional data on an X-Y plane to detect a figure. A sound source information generator processes information of the detected figure to generate sound source information containing the number of sound sources as generation sources of acoustic signals, the spatial existing range of each sound source, the temporal existing period of a sound generated by each sound source, the components of each source sound, a separated sound of each sound source, and the symbolic contents of each source sound.