Audio signal processing method and audio signal processing device

An audio signal processing device comprising:

• an obtaining unit configured to obtain a first audio signal and a second audio signal which represent a sound field between a first position and a second position, the first audio signal including a sound localized closer to the first position than to the second position as a major component, the second audio signal including a sound localized closer to the second position than to the first position as a major component;
• a control unit configured to generate a first output signal and a second output signal from the first audio signal and the second audio signal;
• and
• an output unit configured to output the first output signal and the second output signal,
• wherein the control unit is configured to:
• extract a first signal and a second signal, the first signal being a component of a sound included in the first audio signal and localized closer to the second position than to the first position, the second signal being a component of a sound included in the second audio signal and localized closer to the first position than to the second position;
• and
• generate (i) the first output signal by subtracting the first signal from the first audio signal and adding the second signal to the first audio signal, and (ii) the second output signal by subtracting the second signal from the second audio signal and adding the first signal to the second audio signal.