Hello there Melchiorre333,
We understand you're still having some issues after installing and uninstalling a third-party audio driver on your Mac. Let's take a closer look as we do our best to provide some additional insight.
To get started, does this also happen while using Apple apps like FaceTime? The reason we ask is if this only happens in third-party apps, then you may need to look for audio input/output settings in those specific apps that may still be set incorrectly.
In the meantime, you can use these resources to help ensure your Mac's system audio settings are set correctly:
Change the sound input settings on Mac
Change the sound output settings on Mac
We hope this helps get you pointed in the right direction.
Take care.