I’d have to play around in OSC Editor, but I believe that OSC does not (at least by default) send an ‘up’ notification when you release the button. Or Onyx does not listen to it if OSC does send one.
So you can trigger things with Down presses, but not Up.
In your case Taraguitar, can you leave it as toggle and tap the OSC button again to release?
I’m hoping once the hardware side of things settles down that we’ll get some OSC development.
There are a lot of things that could be included as OSC commands that are not currently.
Hell I’d even settle for a complete breakdown of OSC command identifications for the existing stuff.
(Yes I know there’s that pdf doc, but its limited and does not map what ID#'s are for what control very well)