Joecozzi, thank you!! This is the crux of my problem – I read through perhaps some older threads and have set up the Atom to send PC #123. I think this then scrolls through states on the H9. I now note that PC #123 Toggles the tuner on and off, which I thought was the setting needed. I assume I need to use CC “Toggle Tuner” in the H9 controller?
I have no other midi programmes going on within these presets.
The G3 app should be released shortly, but isn’t yet available.
I’ll have a mess with it now. Thanks,