Audio signal processing method, audio signal processing apparatus and a non-transitory computer-readable storage medium storing a program

An audio signal processing apparatus comprising:

• a sound source position detector that detects a position, in a sound space, of a sound source that generates an audio signal, the sound space being divisible into a plurality of areas;
• and
• an initial reflected sound control signal generator that generates an initial reflected sound control signal by convolving (i) an impulse response of an initial reflected sound linked to a first area corresponding to the detected position of the sound source to (ii) the audio signal of the sound source without convolving (iii) an impulse response of an initial reflected sound linked to any of the plurality of areas of the sound space other than the first area of the sound space corresponding to the detected position of the sound source to (ii) the audio signal of the sound source,
• wherein the initial reflected sound control signal generator further sets a representative point in each of the plurality of areas in the sound space, and wherein the first area includes a representative point having a shortest distance between the representative point and the detected position of the sound source.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute processing comprising:

• detecting a position, in a sound space, of a sound source that generates an audio signal, the sound space being divisible into a plurality of areas;
• generating an initial reflected sound control signal by convolving (i) an impulse response of an initial reflected sound linked to a first area of the sound space, among the plurality of areas of the sound space, corresponding to the detected position of the sound source to (ii) the audio signal of the sound source without convolving (iii) an impulse response of an initial reflected sound linked to any of the plurality of areas of the sound space other than the first area of the sound space corresponding to the detected position of the sound source to (ii) the audio signal of the sound source;
• and
• setting a representative point in each of the plurality of areas in the sound space,
• wherein the first area includes a representative point having a shortest distance between the representative point and the detected position of the sound source.