Audio does not work in IOS 11

Options

When I connect from my Ipad to Windows 10 I can not hear any sounds. In the advanced settings on the Ipad, the option "Play computer sounds and music" is turned on. Logs say this:

2018/01/25 00: 50: 50.907 795 1216155 0 !! CAudioBuffer :: process wenn not Running
2018/01/25 00: 50: 50.931 795 1216155 0 !! CAudioBuffer :: process wenn not Running
2018/01/25 00: 50: 50.931 795 1216155 0 !! CAudioBuffer :: process wenn not Running
2018/01/25 00: 50: 50.931 795 1216155 0 !! CAudioBuffer :: process wenn not Running
2018/01/25 00: 50: 50.931 795 1216155 0 !! CAudioBuffer :: process wenn not Running

Oh, sorry, I just **bleep**. In the new ios 11 interface, I did not notice that the silent mode is not deactivated.