Yamaha MG12UX mixer / Cubase Ai 9.5 USB level issue?

Hi all, I recently bought an MG12UX mixer, but the USB signal levels seem off.

Both PC volume (media player, youtube etc) and all 3 of my DAWs (Reaper for a ling time, Ableton lite and Cubase le recently free with gear)behave the same.

  1. Volume outs - the levels are VERY hot. I can tame the PC outs from the audio tabs, but not the DAWs. When I send a track out set at 0db in the daw, the PFL level in the mixer is just peaking - about +16db. IfI send a low level of -16, the PFL: meters read 0db.

  2. Input levels are off by the same amount, but in reverse. That is if I send a 0db signal from the mixer, the Daw only registers a -16db signal.

Obviously I can just send/receive using the Mixer levels, but that gives me a low level to work with in the Daw.

No idea whats causing it - but it would seem that the mixer is seeing a 0db signal, when the PC and Daws are seeing 0db. As a digital signal that shouldnt happen. Its like theres a 16db pad on the USB outs, and 16db gain on the usb in - or possible vica versa at the PC (16bd pad on the ins and gain on the outs).

No idea how to fix it - or do I have a faulty mixer?