I just discovered this plugin today and testing it out. It's so close to working how I need it to for my setup! Unfortunately certain actions aren't working how I would hoped for, more specifically volume control, mute toggle, play/pause media, start and stop record.
I have tried to setup the action for Set Volume on the audio source as close as possible like what is shown in the videos (the matrix looks a little different on my end, picture included) and the closest thing I could get it to do is either an on or off for the volume control on either a fader or knob as someone else described. Using the Listen Many would automatically select Pitch Bend in which the Value would show the proper Value 0<->127, but nothing would happen on the fader after the fact. If using a knob, the Message Type would automatically change to Control Change and I would only get an on off action after the fact.
For the mute toggle action, it does the action (mute) when I press the button that I assigned it to, but as soon as I let go/depress the button it toggles the mute button off instead of staying on until I press the button again. Also, none of the LED's are activating like shown in the videos.
Play/pause Media is similar to Toggle mute in which it will pause the media when I press the button I assigned it to, and then play as soon as I depress the button. If that is what these actions where intended to do then they are working correctly, but I would just prefer that they run as described for the toggle mute. Other actions could probably be combined like Start record, stop record, etc.
The other actions in my settings work great. Do Transition works perfectly on the buttons I assigned them to for all of my scenes. Stop media does exactly what it supposed to though I wouldn't have a need for this action if the play/pause worked how I described for the Toggle mute. Same for the Start and Stop Record actions.
Anyway, thank you for all the hard work you put into this plugin it's really helping our workflow! I'm looking forward to see how this progresses.
OS: Kubuntu 20.04
OBS: OBS-Studio 27.1.3
Controller: Tascam US-2400
Side note: The Tascam US-2400 has built-in presets for things like Mackie Protocol, Pro Tools, Nuendo, and other DAWS which might play a role in how it will react to your plugin. I currently have it set to Mackie Protocol.