audio doesn't work when ds4 is plugged

`The way I do it, is:

1. open ds4windows at startup (have a profile that uses directinput only)
2. Connect controller, this already gives me access to mousepad.
3. Open steam, and it recognizes my controller and audio works fine from headphones.
4. If i dont use directimput, ds4windows has a bug in which sound is muted as soon as controller vibrates.`

https://github.com/Jays2Kings/DS4Windows/issues/302