On my es-8 I set my mute switch to activate the tuner from any patch and set it to toggle so I can turn it on and off.
you have to tell mute not to mute, send the cc to your h9 or h90 and set the mute switch to also activate the loop your h9 is on.
don’t know about the tuner A# side because I’m tuned to B standard – did you set the input as bass?
