Patent ID: 8199932

Claim:
A signal processing apparatus comprising: a plurality of multiband equalizers, each configured to receive an audio signal from among a plurality of audio signals for a plurality of respective audio channels, and each of the multiband equalizers configured to perform at least gain adjustment in a plurality of frequency bands for a received audio signal; a plurality of output means, each for a respective channel of the plurality of audio channels and each configured to output a respective sound signal from a respective audio signal by a respective multiband equalizer; measurement means for measuring frequency-amplitude characteristics of each sound signal output from the plurality of output means; and computation means for performing a computation process for correcting the measured frequency-amplitude characteristics, wherein the computation means is configured to compute at least one first parameter to be set for a first multiband equalizer of a respective first channel so that the corrected frequency-amplitude characteristics for the first channel, more closely match predetermined first target characteristics, and wherein the computation means is further configured to use the corrected frequency-amplitude characteristics as second target characteristics for channels other than the first channel, and is further configured to compute at least one second parameter to be set for a second multiband equalizer of a respective second channel so that corrected frequency-amplitude characteristics of the second channel more closely match the second target characteristics.