Why the sounds of system in the anniversary update is very low and muffled?

[Windows Central Question]

Lumia 1520 and Lumia 950XL DS

 

[Chintan Gohel]

Lumia 1520 and Lumia 950XL DS

this is for all tones such as ringing tones and alerts or just some?
You've made sure both ringing and apps volume are high?
Have you tried a soft reset?

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