GPIO Use after hat is installed

Hi,
Just ordered the HiFiBerry DAC+ADC. Once that hat is on my RP4B, will I have any available GPIO pins for IO, or will I need to use the USB ports?

-edit-
are those extra jumper pin holes for further GPIO expansion?

Hi @laserbeak43,
there are a few pins available after you plug in the HiFiBerry but not many.

You might want to check HiFiberry’s documentation for more details.

Thanks,
I’ll have a look.