I know I, like several Mac users, have enjoyed the benefits of SizzlingKeys key commands to Play/Pause iTunes without having to look down at my keyboard to find the F8 key. Now with moving onto Mac OS X Catalina 10.15 and the death of iTunes on the Mac, now rebranded the 'Music' application, using SizzlingKeys is no longer an option. After endless Googling ...
Alfred 4 fits this niche nearly perfectly.
Go to Alfred Preferences -> Workflows -> +. Then click Templates -> iTunes and pick the function you want to set up with its accompanying keyboard shortcut.
NOTE: Alfred is still using "iTunes" instead of "Music" in version 4.0.8.