In audio terms, coincident is normally used in the context of stereo microphone pairs. The idea is to get the capsules of the two mics as close together as possible to minimize phase problems in the final recording. Often the mics are directional (i.e. cardioid) and are “stacked” one atop the other, commonly at an angle of 90 degrees. Another coincident miking approach is called “MS” or “Mid-Side”. Here a bi-directional (figure 8) and cardioid mic are placed close together. By combining the outputs of the two mics in varying amounts, the apparent width of the stereo field can be changed.