User manual

22 MIXY - User Manual 55 000 057 - B
3.13. Using the L/R l M/S transcoding
This chapter shows examples of situations where L/RlM/S matrixing can be used
and the effect of matrixing in these situations. Due to the flexibility of MIXY, this
is not an exhaustive view and other configurations are also possible.
3.13.1. Case 1: standard stereo engineering
This is the most common application. In this case, mono microphones or normal
(L/R) stereo microphone couples are used, and the output of the mixer is in standard
stereo format.
L/RlM/S matrixing is not needed in such an operating mode.
However, L/RlM/S matrixing may be used occasionally for monitoring, as a way
of visually checking the stereo image coherence on the level meter display. If
matrixing the monitored signal, the “left” bargraph shows the L+R sum, while the
“right” bargraph shows the L-R difference. For common stereo production, the L-R
level should be much lower than the L+R level, especially when mono
compatibility is desired. On the contrary, L-R level higher than L+R level would
warn about a possible problem in sound pick-up (e.g. one microphone in a stereo
couple is phase reversed).
In this situation, the digital outputs (AES, Toslink and USB) all deliver signals in
“classical” stereo mode.