There is a reason why all of the big mastering places all over the world have been using the M/S technique for decades – without really telling anyone about it …
Most people who are into recording music know about the M/S microphone technique where you have two different microphones for mid and side signals. Recording a signal with M/S microphone technique means to create a stereo (L/R) signal by mixing the M and the S signal together in a special way that will create a very mono-compatible stereo signal. To record in M/S you have to feed the M-signal to the Left and Right channel of your mix and the S-Signal will be fed phase-correct to the Left-channel and phase-reversed to the Right-channel. This means you will have to split the S-signal and use a total of three channels for only two microphones that will be mixed together to a conventional stereo-signal. The bx_digital does all that work for you, just feed it with the separate M- and S-microphone signals.
For additional details about this technique you may have a look into every decent book about recording basics if you want to learn more about this method to create very mono-compatible stereo-signals, e.g. when recording drums, classical music, choirs or accoustic instruments in general.
Well, it may sound simple, but our bx’s have a built-in M/S matrix that will separate every stereo signal into its mono sum and the stereo difference signals. This way you are able to separately control these two signals which can be very useful when you work on a stereo mix that has certain “problems” or if you just want to enhance certain elements in the mix.
Ever tried to cut high frequencies of a mix to reduce the "essing" of the lead vocals and at the same time boost high frequencies of your harmony instruments (guitars, keyboards, pianos, etc – most likely recorded or mixed in stereo)? Well, with the bx1 / bx_digital and their M/S mastering mode you can do exactly that!