[Kiralina]

i think:
Can you try creating a file
/storage/.config/modprobe.d/disable-snd-bcm2835.conf

This file You can create directly on your Pi

containing:

blacklist snd-bcm2835 (Popcornmix posted)

login over ssh (Putty) and: nano /storage/.config/modprobe.d/disable-snd-bcm2835.conf

then write: blacklist snd-bcm2835
strg O
str X

thats all - reboot and yout hifiberry works

....or read the 3-4 posts over yours ;-)

Thanks. I did read the posts, but I thought it was different for the HiFiBerry digi board.