After doing my own internet searches on the issue because I would like to know for my own Logitech keyboards, this is what I found-
Make sure you are using Logitech SetPoint.
Follow these steps.
Adds the following default keyboard shortcuts to open.spotify.com: Play/Pause media key: play, pause Previous media key: previous track Next media key: next track There is no default shortcut, but you can also bind keys for: Toggle shuffle Toggle repeat (once, all, disabled) Toggle song like You can customize these shortcuts and make them global hotkeys (not just while displaying Spotify).
1. Close Logitech SetPoint by right clicking the icon on system tray.
2. Open notepad with administrator (right click and run as administrator).
3. When in notepad, open the file 'C:Program FilesLogitechSetPointPplayers.ini' (Your folder might be named SetPoint instead of SetpointP on older or upgraded versions).( If you dont see this file you must select 'All Files' in the dropdown that says 'Text Documents').
4. At the end of the section [Players], add the following line:
spotify=wac,spotify.exe,SpotifyMainWindow,xxx,xxx,xxx,xxx,xxx,xxx,xxx,0,1,Spotify
5. Save the file. (If this fails or Save As dialog pops up, this is probably because you didn't run notepad as an admin. Since this is inside the Program Files directory, you need to be an admin to edit.)
How To Use Spotify App
6. Kill any processes belonging to other media players (especially wmp)
7. Launch SetPoint again ('Mouse and Keyboard Settings' in the start menu or restart the system) and verify that the media keys now work better.
Just a note : The keys are able to control Google Music through an addon after you close SetPoint. It will not work while SetPoint is open. This breaks all the other SetPoint keys while it is closed (zoom, window stack, calculator, etc.)
Another alternative is-
1. Open start menu.
2. Type 'Device Manager'.
3. Open 'Keyboards' from the list - you should see a Logitech Keyboard there.
4. Double click this item (or right click -> properties)
5. Click 'Roll Back Driver'.
Use Keyboard Media Keys With Spotify Apps
This essentially resets it back to the original Windows Driver. This will break your other function keys.(Your mouse buttons will still integrate with SetPoint, just in case you use other functions on your mouse.