Rocksmith supports a DLC store where users may purchase new songs, in-game pedals, and in-game amplifiers. Bass guitar functionality was added to the North American version of the game via downloadable content on August 14, 2012. All DLC songs are forward-compatible with Rocksmith 2014, but DLC songs released on or after October 22, 2013, are compatible only with Rocksmith 2014 and will not play on the original version of Rocksmith.