Strange Sound

[PROCOW]

I bought my phone like 5 months ago and from then on some applications/games when you load something or just press button to load anything or just do something it makes a strange sound like electric crack, it's really hard to explain the sound but its like cracking, the sound appears even when the phone is completely muted by saying completely I mean everything sounds in app sounds, that's really annoying.
Game that this sound appeared: My Hero(football/soccer)

---------------------------Android update--------------------
Exact date when Android 6.0 will be released on M4 Aqua?

[Uliwooly]

@PROCOW

Does it happen with all games and/or apps? 

[PROCOW]

No, but for some it does, apps are not hacked moded.

[Uliwooly]

@PROCOW

Contact the app developers on the apps/games that you get this issue.

[Uliwooly]

@PROCOW

UPDATE: 

I'm not sure if it's the same issue, but whenever I open Clash Royale on my Z5 and Z5 Premium I get a noise (coming from the loud speaker) like if music was about to start. 

Could you guys recreate this? @Quester @alexdon