IL-2 BOS sound not working at all

[Monotonea]

My IL-2 BOS suddenly not making any sound at all.

Other games and apps on my computer work well.

Would you please give me a solution?

 

startup.cfg is below.

 

[KEY = sound]
    count = 128
    debug_radio = 0
    interface = 1
    interface_music = 1
    quality = 1
    speedenable = true
    volume = 1.00000
[END]

 

Thank you.