Ropieee and Allo Piano 2.1 - can't set subwoofer to 2.1

I have a Pi 3b+ Kali Piano 2.1 that I want to run as 2.1. I can’t seem to set the ‘subwoofer mode’ to 2.1.
I have managed to change the ‘Dual Mode’ to ‘None’, but the only ‘subwoofer mode’ in alsamixer is ‘2.0’
I’ve tried in amix an alsamixer, with no luck so far.

Do I need to load dsp files for the Piano 2.1?
Thanks in advance from a total noob.