Stop windows lowering the music volume when a call starts

We've started using Sqwiggle to aid remote working which is awesome. The only issue is recently I've noticed that when someone starts a conversation or sends an instant message Spotify and Windows Media player reduced their volume and wouldn't come back up. Turns out the fix is pretty simple if you want to keep control:

1. Open your "Playback devices" options by right clicking the speaker icon in your toolbar:

2. Click the "Communications" tab at the top:

3. Set the option to "Do nothing"

You're done! Enjoy