By menu bar do you mean the dock? If so you can as Papanate said just drag the app to the dock, or you can open the app then right click the icon on the dock and under the options menu select "Keep on dock"
If you really mean to add it to the menu bar, open control panel and drag the music module to the menu bar. This will allow you to open the Music app select a playlist and start/stop once selected. To remove just command click and drag off the menu bar.