Sim sound always at max less ATC voices

I have a problem with sound after the last two updates, the sim with main simulator always was bound to the main volume of W10 and its main slider, now, while the loads pages of the sim in the beginning in some moment the sim achieve the max volume of the Decoder in DTS Interactive 5.1 and only remain bound to the master volume if I up or down it in W10 sound volume slider, the ATC voices¿¿??. Any idea, it is me? more with the same problem?. Only the sound stops when I mute the sound in W10.