Just noticed that the Boss DAC isn't listed in the DAC section, are you sure it's supported yet?

When my Piano wasn't supported I chose the RaspyPlay4 DAC that's listed and it worked fine.

Might be worth a try until the Boss is added to the list.

Didn't realise it's not listed which will be a pain as I've just ordered one that will be here in the next few days Doh!

EDIT: I see the Boss Dac is listed as being supported in the notes above so it will be doable to get it running 😊