Hello,

It is unclear what may be happening here. The H90 can be placed anywhere in the signal path without issue.

Are you sure you are sending a stereo signal to the H90? And all of the post processing is fully stereo? The effects processing may sound different if you are only hearing 1 side of the stereo image.

It may be easier to troubleshoot this issue if you email support@eventideaudio.com with some videos that demonstrate the issue. It’d be useful to see the H90 working properly as the only device in the chain, and then seeing another video that demonstrates the issue with all of the pedals in the chain.