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xuxuehaiTo make or build just type make To test: - 1) Just stereo sound from one stereo jack: - ./speaker-test -Dplug:front -c2 2) A 4 speaker setup from two stereo jacks: - ./speaker-test -Dplug:surround40 -c4 3) A 5.1 speaker setup from three stereo jacks: - ./speaker-test -Dplug:surround51 -c6