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Passive matrix for Double M/S


Our investigations also considered other ways to optimize the functioning of the double M/S sets in concert halls and other typical settings in which surround recordings must maintain a fundamental front-back distinction. For example, delaying the surround-channel signals can improve the perception of spaciousness and avoid localization errors throughout a wider listening area. As a further measure to improve the spatial impression, the double M/S array can be augmented with more distantly-placed room microphones.

Phantom powering is required on only three of the inputs to which the M DMS is connected.

Note: The coefficients of the M DMS have been set for use with a front-facing SCHOEPS cardioid microphone. Unfortunately, the supercardioid or shotgun alternatives of the other Double M/S sets would not produce suitable results with this arrangement.

Surround setup with M DMS U

The directional patterns which are effectively created by matrixing the output signals of the connected microphones

If the microphone signals are to be recorded directly and processed only later, an optional XLR-7 to 3 × XLR-3 adapter cable (model AK DMS/3U) can be used in place of the splitter box.
Similarly, the AK 3U DMS adapter cable (3 x XLR-3F to XLR-7M) is available so that the splitter box or matrix can be positioned at the far end of a multi-core extension cable.