free device : local exclusive arm

[chapelier fou]

https://maxforlive.com/library/device.php?id=6553

With this device, you can create groups of tracks that mutually unarm the others when they are armed.
Many possible uses.
Personally, i've been using it when playing in a band where several MIDI controllers played by several people were going to the same computer. It allowed each musician to remotely select the track they were playing.