I have been trying for days to get a Send and its Return block to imitate a y-split. In this case I use a small cable to connect the send and return however there is always a tone loss when compared to simply using a y-split. I have determined it is not the cable through isolation testing, so I am now wondering what settings I could possibly set to make these functions interchangeable. Pictures below for reference, the one with send and return blocks is much more brittle, however all settings are effects and settings are identical (the volume block is bypassed and is acting as a place holder to preserve the parallel path).