No audio device preference

[sabayon11]

I have USB card Prodigy Cube
http://i.imgur.com/8rJdSQD.png
system Kubuntu 16.04 recognize it (I added backports and installed
plasma-desktop on top of Xubuntu)
but in device preference it is not listed, actually onboard audio card is
not listed either
http://i.imgur.com/vFZzf0i.png
http://i.imgur.com/8cH3FKL.png
Do I have to install additional packages or is it a Plasma 5 bug?
In Kubuntu 14.04 everything is fine
http://i.imgur.com/8R5WeM2.jpg
I can hear music from this USB sound card but I can't set device preference.

To test kubuntu backports is it necessary to install first kubuntu-desktop
and upgrade or installing plasma-desktop alone having backports repository
amounts to the same thing? I guess not exactly because apllications didn't
install but I wonder why there is no kubuntu-desktop package in backports
repository. I thought that all package from regular Kubuntu are replaced.
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