Mopidy sound only on Laptoxbox but not at USB Output

Hi have Sound on Laptopbox but can’t change to the USB Headset with Arch Linux. Can’t change audiooutput anyway. I^m shure the USB Headset is working with Arch Linux i can send test sounds.

Plz help

With demask (#) the alsa config in mopidy.conf change to software mixer and autooutputsink config at least uninstall mopidy-alsamixer.

It’s working now