Common 'purist' two channel microphone techniques can provide a believable impression of depth, but only work for listeners that are equidistant from the two loudspeakers. With 5.1 channels, it is possible to make recordings that have excellent depth and that localize well over a large area. This paper presents the psychoacoustics of localization, depth, and envelopment as they relate to different microphone techniques. Often the best results are obtained through a combination of miking and electronic early reflections and reverberation.