MS matrix

Each pair of analogue input channels has a switchable MS matrix.  This is intended for use with 'mid-side' stereo microphones, where sum and difference signals are derived from the two input channels creating left and right output channels.  The MS matrices are available when the analogue inputs are in both mic or line modes, allowing external microphone preamplifiers without matrixing to be used.

Note that there is no explicit stereo width control provided in the matrix; however width can be adjusted by balancing the gains of the mid and side inputs - the gain steps of the Atlas microphone preamplifiers are fine and precise.  In line input mode, no fine gain adjustment is available, so if the Atlas MS matrix is used with external preamplifiers, these must have fine and accurate gain control if width adjustment is required.

The MS matrix is switched on and off in the Inputs tab of the Atlas Control Panel app.