VK-Pause is a Chrome extension with one essential target -- switching play/stop/playnext state of music playing with vk.com
Alt+N - stop/play/next (double tap) shortcut for Chrome active state
Shift+Ctrl+9 - stop/play/next (double tap) global shotrcut for background state
Double Alt+N - next song as is a double click on app icon
Double Shift+Ctrl+9 - next song in background state