Hi I use Raspberry Pi plus Digi Hats as players in some of my systems and in some cases the output from the Digi card is lower than normal . I use the option after ssh in to the card of alsamixer and then under the instructions I should be able to F6 to the card being used and check that the Digital Output has been set to maximum . However with both Just Boom Card and Hi Fi Berry Digi + Pro I can access the alsamixer but I am not able to switch the card inputs with F6 it does nothing . Please can you advise if this is due to your preset for these cards or is there another issue . Sorry I was going to include a copy of the alsamixer window . as it appears but it will not paste in to this message