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Old Mar 9th 2016, 06:45 AM   #1
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Will decorrelating an audio signal help reduce interference patterns at low frequenci

In live sound it is common to have a left/right sub-speaker configuration, which will produce an strong interference pattern in the audience area based on listener/sub-speaker locations.

If the left/right sub-speakers were decorrelated (phase randomization?) would this help reduce the interference pattern in the audience area? Would the effect be minimal or significant at low frequencies?
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Old Mar 10th 2016, 08:28 AM   #2
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While one might (in theory) expect a noticeable interference effect as you suggest, I have never actually noticed it in practice.

I am guessing that this is due to a combination of factors;
Firstly there is usually a bank of speakers on either side, the different lengths of the wires connecting to each bank and to different speakers within each bank will almost unavoidably introduce the kind of phase randomisation you describe;
Secondly the mixing desk will be dividing the input signals unequally between the two banks of speakers to purposely generate a stereo image.
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