Audio jumps up system mixer (linux,Qt5)
I added Audio element from QtMultimedia 5.0.
No settings, just id set. By this id with button i adding source and activating play().
Then play activates first time system mixer volume ups to 100% and i hear very loud sound.
Second and other times volume stands as i set.
tested on Mint Mate (Qt from Ubuntu PPA) and Archlinux Gnome-shell (Qt from Downloads).
What i forgot to install?