You are incredible, really amazgin 
For the fun extract from their FAQ:
How to mirror with internal audio (entire device system audio) ?
To mirror with internal audio you need to have a ROOTED device with Android 4.4 or higher. Then:
- Go to app preferences, audio preferences
- If you have Android 6 or higher you need to install our Internal Audio Plugin app as indicated in settings
- Select the “Internal” audio source or “Mixed” audio source
- Go back from settings and start a new mirroring
So now please stop posting for real, this is no more fun.