Double MS recording

Double MS recording is an audio recording technique used to record surround sounds using three microphones. The mid mic usually a cardioid mic like MKH 40 or MKH 50, the sides using a figure of 8 mic like MKH 30, and the rear using another cardioid mic like MKH 40 or MKH 50. This is usually used for recording ambiance sounds and not live music[1][2].

From these three tracks, five channels can be extracted:

  • Center= Mid/Mid Mic
  • Left=Mid+Side
  • Right=Mid+Invert(Side)
  • Surround Left=Rear+Side
  • Surround Right=Rear+Invert(Side)

References
  1. https://files.plugin-alliance.com/products/schoeps_double_ms/schoeps_double_ms_manual_en.pdf
  2. https://www.soundonsound.com/techniques/double-mid-sides-array
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