My organ has buttons, not tabs or stops. When I push a button it sends a midi controller signal, the same one each time. I have set Hauptwerk to "toggle" the input switch. Also in the organ I have set the input switch to "Change Current Setting" in two places.
Now when I repeatedly press the button the stop on the virtual organ switches on and off as expected.
But suppose a stop is off and I press a *piston* that switches it on. Now when I press the button for that stop it does not switch it off - I have to press the button twice.
Surely Hauptwerk should know the stop is on and needs to be switched off on the first press.
Maybe I do not have the Hauptwerk or Organ settings correctly specified.
The organ is the Virginia Wurlitzer. Any clues?

