A/B is the most simple stereo technique to use. Quite simply, two microphones are pointed straight ahead at a source. This technique sounds surprisingly good on acoustic guitar and very close to the front while recording live; however, there's not much stereo image, if any, and a lot of ambient information is lost.
A/B is the preferred method of tapers who stack tape - taping close to the speakers to get a cleaner sound. However, A/B isn't as useful for taping further back, as a good stereo image is necessary for full reproduction of the event.
Spaced Pair
With this method (also called AB), you place two identical mics a few feet apart and aim them straight ahead (Figure 4). The mics can have any polar pattern, but omni is most popular for this method. The greater the spacing between mics, the greater the stereo spread. Figure 4. Spaced-pair technique.
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