What is the The 3:1 Technique?

What is the The 3:1 Technique?

The 3:1 rule helps prevent phasing issues.

What’s the rule? When using two mics on a single source, the distance of the second mic from the source should be three times the distance of the first mic from the source. 

3:1 rule

How can you apply this rule as a recording drummer? If, for example, you place an overhead mic 3 feet from your snare, and you want to add another room mic, the second mic should be at 9 feet from the snare, in order to avoid phase issues. 

GRAPH STEREO OVERHEADS AND ROOM 9 FT
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