Re png in post above:
By the way, I don’t really want “Mute” as an action, as there may be tracks muted for various reasons, and it is no help in this situation. But I have to choose some action. I tried Selected but that deselects and thus disarms the track, which is unwanted when ENABLING the VEP instrument channel.
FURTHER EDIT/UPDATE- in fact this MUTE is operating unpredictably on GPO as plugin directly to Cubase. Recorded values suggest pedal is recording continuous values, other than 0 or 127, and I can’t clarify what they are doing as they are not muting playback of recording. But they did mute when playing.
I am trying this with GPO as direct plug in Cubase not as plug in to VEP, as with this controller setup and automation in VEP, VEP freezes with a hanging GPO sample upload at Enable. The other libraries enable/disable satisfactorily, though a little laggy on my system.