Sound with inactive window

Hi guys.
When I switch windows and L2 is in the background, the game sound stops. How to disable it?

 

Somewhere in options look for "background performance" or smth similar. Sony remember exacly. But i dont recommend to switch it.

 

This only reduces the frame rate to improve performance when the game window is out of focus, it has nothing to do with audio.
There is a trick to make a window believe it's always focused but it requires third party code injection and this is not allowed.

 

The option is unchecked, but the sound still stops.