You are welcome to describe your firmware request in the Shipping Notes field during checkout and we will load onto your DAC before shipment.
Setup is easy. On your console, navigate to:
Settings ? Devices ? Audio Devices ? Output Device ? JDS Labs Atom DAC UAC1
PS4 and PS5 are known to limit USB Audio output volume. All of our UAC1 firmware is locked to max volume as a workaround (you can still adjust volume at your console).