Hi! I am trying to re-create the popping issue you are having with the dual H9 Setup. I emulated your setup (with a few differences i.e Master control instead of MIDI Mate. I also did not use the TS8MS and just plugged the guitar in straight into input 1 of H9A), I was not getting a loud popping noise when I was switching between the two presets. Can you try a few things?
1.) Can you try turning off PRE/POST and see if the popping persists?
2.) Can you try taking out the TS8MS pedal out of the chain and just having the guitar plugged straight into input 1 of H9A.
3.) Finally, can you try using a different MIDI foot switch?
We’re just trying to isolate the issue so that we can come up with a good solution to fix it.
Sorry for the inconvenience!
