Utilized 2to3 and omitted some unnecessary/incompatible commands so it can now work with Python 3.
I also modified it to sleep 4 seconds before looping instead of 2, as I felt 2 was a little fast.
Requirements (pip install):
psutil
pywin32
Use command
python OBS_Music_Plugin.py "PROCESS_NAME"
to start!
Feel free to script it behind the scenes, too.