Spatial hearing -- Correlation and coherence -- Stereo microphone techniques -- Surround microphone techniques -- Artificial head recordings -- Some thoughts on subjective listening tests -- Analysis of frequency-dependent signal correlation and coherence in surround microphone systems -- Analysis of frequency-dependent signal cross-correlation (FCC) in stereo microphone systems -- Discussion and conclusion: an attempt at a qualitative ranking of stereo and surround microphone techniques- an examination of various studies in the field -- Binaural quality index of reproduced music (BQIrep) -- A short history of microphone technique and a few case studies