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Vectorscope
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===Audio=== In audio applications, a vectorscope is used to measure the difference between channels of [[stereo]] audio signals. One stereo channel drives the horizontal deflection of the display, and the other drives the vertical deflection. A monaural signal, consisting of identical left and right signals, results in a straight line with a [[gradient]] of +1. Any stereo separation is visible as a deviation from this line, creating a [[Lissajous figure]]. If a straight line appears with a gradient of β1, this indicates that the left and right channels are 180Β° out of phase.
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