Re: Windows Media Player: no sound when playing midi files
I imagine that it's the Windows 10 creators update.
They did quite a bit of work with sound and audio processes. In my case, it cured a problemWM I was having that I actually thought was a hardware problem. However, you do a Google search for "Windows 10 creators update audio not working", you will see that there are many problems with the update from an audio point of view.
I have no problem with sound in general, and Windows Media Player has no problem with mp3 files. It's WMP + midi that doesn't work anymore.