Signal processing device, signal processing method, and program

A signal processing method, comprising the steps of:

• dividing, by a signal processing device, an audio signal into signals in a plurality of bands corresponding to respective bands of a plurality of speaker units of a multi-way speaker;
• and
• performing, by the signal processing device, wave front synthesis filter processing on each of the audio signals in the respective bands having been divided into,
• wherein the audio signal in each of the bands after the wave front synthesis filter processing is supplied to the speaker unit of the corresponding band in the multi-way speaker.

A program for causing a computer to function as:

• a band dividing unit that divides an audio signal into signals in a plurality of bands corresponding to respective bands of a plurality of speaker units of a multi-way speaker;
• and
• a wave front synthesis filter processing unit that performs wave front synthesis filter processing on each of the audio signals in the respective bands having been divided into,
• wherein the audio signal in each of the bands after the wave front synthesis filter processing is supplied to the speaker unit of the corresponding band in the multi-way speaker.