I was able to switch to spice console . Details here :-
http://bderzhavets.blogspot.com/2015/06/enable-dashboard-spice-console-in...
Then I manually patched virt/libvirt/config.py and driver.py following :-
http://www.slideshare.net/YukihiroKawada/rdo-spice
I got cut&&paste feature for spice console to VM opened via virt-manager either
spicy.
But , regardless in virt-manager's panel showing features I see sound "ac97"
,
movies are running silently.
Thank you
Boris