Can I edit which sections of the instruction
From the HiFiBerry website:
Configure device tree overlay file
You don’t have to edit /etc/modules anymore, but need to load the correct device tree file. To do this, you must edit /boot/config.txt and add the following line
DACdtoverlay=hifiberry-dac
DAC+dtoverlay=hifiberry-dacplus
Digi/Digi+dtoverlay=hifiberry-digi
Amp/Amp+dtoverlay=hifiberry-amp
Frank