Pi 3B+ with Pi digiamp+

Hi All

I am currently running latest version of Volumio through a new Raspberry Pi 3 b+ and have my music collection on a large USB hard drive.
Everything works as it should. At the moment I am using the audio out jack which is feeding an old Onkyo Amp and speakers.
I have ordered a Pi digiamp+ which I should receive mid. next week.
I have read that with that hat the default is a muted sound output on the hat. Is this old info. or is it something that I will have to deal with.

Many thanks for any help with this.