Patent ID: 7369666

Claim:
An audio synthesizing system for causing a first loudspeaker and a second loudspeaker to produce sound by a first audio signal, a second audio signal and a third audio signal, said first audio signal, second audio signal and third signal being supplied from a sound source, said audio synthesizing system comprising: an input section for inputting the first audio signal, the second audio signal and the third audio signal; a dividing section for dividing the third audio signal into two divided third signals, which have a phase difference mutually in one frequency range; a first synthetic section for synthesizing one of the two divided third signals and the first audio signal into a first synthetic signal to output to the first loudspeaker; and a second synthetic section for synthesizing the other of the two divided third signals and the second audio signal into a second synthetic signal to output to the second loudspeaker, wherein the input section inputs the first audio signal, the second audio signal, and the third audio signal independent of each other; the third audio signal has a frequency component that causes a binaural correlation coefficient to become negative at a listening position; a distance from the listening position to the first loudspeaker is different from a distance from the listening position to the second loudspeaker; the binaural correlation coefficient indicates a phase difference of the sound waves from the first loudspeaker and the second loudspeaker at both ear positions of a listener at the listening position; and the dividing section sets a phase of one of the two divided third signals and a phase of the other divided third signal so that the binaural correlation coefficient becomes positive at the listening position.