Hello,
Sorry, I’m not able to follow your diagram. The legend states that * indicates Insert 1, but you have the following shown: *H90(In1) -> wah -> fuzz -> OD -> H90(out1) -> Pre-amp/front of amp*
So which part of this path is Insert 1 on the H90?
When using Insert routing, Inputs/Outputs 1-2 are the main path, and I/O 3-4 are used for the inserts (either 2 mono inserts, or 1 stereo insert.)
If you connect outputs 1-2 to your interface, you will have a stereo signal.
If you have not yet looked at some of our setup diagrams, I would suggest starting here: https://cdn.eventideaudio.com/manuals/h90/1.9.7/content/setup/two-mono-inserts.html
