two modes to be displayed side-by-side. The combined device is typically referred to as a waveform monitor, and standalone vectorscopes are rapidly becoming obsolete. 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 −1, this indicates that the left and right channels are 180° out of phase. References External links "4kScope". Drastic Technologies Ltd. Software vectorscope with free training mode. Film and video technology Electronic test equipment Measuring instruments