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Amplitude panning
Amplitude Panning is a technique in sound engineering where the same sound signal is applied to a number of loudspeakers in different directions equidistant from the listener. Then, a virtual source appears to a direction that is dependent on amplitudes of the loudspeakers. The direction may not coincide with any physical sound source. Most typically amplitude panning has been used with stereophonic loudspeaker setup. However, it is increasingly used to position virtual sources to arbitrary loudspeaker setups.
==History==
First invented by Blumlein in early 1930s, original stereophony was a system that converts the phase difference of the signals recorded by a pair of microphones to the amplitude difference of in-phase input signals to two loudspeakers.〔A. D. Blumlein: Improvements in and relating to sound-transmission, sound-recording and sound-reproducing systems. British Patent No. 34657, 1933.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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