Hello,   There's something that I don't understand with "A/B" and "Merge" block levels.   Let me explain:   Let's say I have a straight signal, from guitar to XLR outputs, no block on the signal, nothing. A blank preset.   Now, I add a 0db gain block, just to be able to split path (If I'm right, we can't split path without a block?). Still the same, the sound has not changed.   Now, if I click on the 0db gain block and move it below, a "Split" and a "Merge" blocks are created.   If I