Hi-about a week ago I bought and installed a Dac+ in order to get better sound. I am using Dac+, Rasberry Pi 3B, Smarti Pi case. I have tried formatting the SD disk from both Linux Mint 18 and Win 10 using both Fat and EXT4.
I have tried using all the methods here on the HiFiBerry site in the Guides/Support section. No sound whatsoever, no matter which method I use.