It is a left-rigt to "Mid-side" or "mono-stereo" converter. It translates Left and Right signals to center(middle) and difference(side) and then back again.
yes, exactly
but i can't open surface and i can't do what i want.
i know how to split in wavelab, but this (real time) way seems to be better.
did you tried this device - did you tried to open surface?
You're right, the GUI doesn't work anymore. 'Empty Device Surface'.
That's a reason to buy some of Neutron's devices. Else he won't be motivated to redo it I think.