Wish I had known about this one years ago, but anyway... better late than never:
1. Step Use Sound Enhancements
1. Step Click on the system tray arrow and right-click the speaker icon, select Playback devices from the dropdown
2. Step Double-click your default speakers (not sure? start a track and see if green bars appear)
3. Step Go to the tab Enhancements and check the option Loudness Equalization
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