ardour/tools/udev
..
50-ableton-push2.rules
99-counterdesign.rules
99-cpu-dma-latency.rules
99-maschine2.rules
README.md

These files are intended to be copied to /etc/udev/rules.d/ on a GNU/Linux system, in order to grant permissions to access various devices to users in the audio group.

After doing so either reboot, or restart udevd as follows:

sudo udevadm control --reload-rules
sudo udevadm trigger