Thanks to the Create global hotkeys to control Google Music playback post from June 23, 2011, I figured out how to control Google Play Music All Access via AppleScript. This is useful because I have a Griffin PowerMate which can be configured to launch AppleScript commands. Now I can pause/play music and skip to previous/next track my pushing or rotating the PowerMate. I had previously done this for the Mog OS X application and I wasn’t willing to switch to Google Play Music All Access because of the lack of global keyboard bindings. Now I have them.
The following are adaptations of the script posted on Create global hotkeys to control Google Music playback but I’ve updated them to be a little more fault tolerant and to work with the latest Google Play Music All Access.