You should reinstall or at least update the soundcard drivers. There are many problems encountered by users regarding the Windows 10 Creators Update. The update on my PC messed up the GPU and the networking although there were no drivers available, so I had to install older ones.
If you still have issues after this operation, then simply downgrade the OS to the previous version until more patches are released to fix problems. Go to Start > Settings > Update & Security > Recovery > Go back.