DAC2 PRO on Ubuntu 23.10

I am trying to get a HiFiBerry DAC working on a Raspberry Pi 4 running Ubuntu 23.10. I can see that unlike Raspberry Pi OS, Ubuntu lacks the hifiberry dtb files in /boot. I grabbed a copy of the overlays folder in /boot from the RPi OS. I also created /boot/config.txt and I put dtoverlay=hifiberry-dacplus in it. By this point, it should be clear that I do not have a clue what I am doing, so it should not be surprising that I am still not able to access the HiFiBerry DAC. There is a file named config-6.5.0-1006-raspi in /boot which is a make config build file. I suppose that I need to make something to let the OS know that the dtb files exist. Any help appreciated.


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