Audio signal processing apparatus and audio signal processing method

An audio signal processing apparatus, comprising:

• a test signal supply unit configured to supply a test signal to each of speakers of a multi-channel speaker including a center speaker and other speakers;
• a speaker angle calculation unit configured to calculate an installation angle of each of the speakers of the multi-channel speaker with an orientation of a microphone as a reference, based on test audio output from each of the speakers of the multi-channel speaker by the test signals and collected by the microphone arranged at a listening position;
• a speaker angle determination unit configured to determine an installation angle of each of the speakers of the multi-channel speaker with a direction of the center speaker from the microphone as a reference, based on the installation angle of the center speaker with the orientation of the microphone as a reference and the installation angles of the other speakers with the orientation of the microphone as a reference;
• and
• a signal processing unit configured to perform correction processing on an audio signal based on the installation angles of the speakers of the multi-channel speaker with the direction of the center speaker from the microphone as a reference, the installation angles being determined by the speaker angle determination unit.