The correct level alignment of the multi-channel reproduction system is critical for the quality of the reproduction. However, the level alignment in a conventional product is controlled manually by user. And if the user is not an expert, it is not easy to align correct level of each speaker. This paper provides how to apply binaural energy summation, which is from all of available positions of speakers, to level alignment for the arbitrary multi-channel reproduction system. If it is possible to measure the distance and the angle of a speaker, and if there is an mnidirectional microphone, it is possible to align the correct level automatically applying the binaural energy summation as the position of speakers obtained before.
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