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Starting from October 6, 2015, all music added to the downloadable content catalog is exclusive to "Rock Band 4". In addition, due to changes in the charting format and gameplay of "Rock Band 4", the released songs no longer support keyboard or Pro guitar and bass (future downloadable content will continue to support vocal harmonies and Pro drum charts), and most songs no longer display "family friendly" or "supervision recommended" ratings. Downloadable content from previous "Rock Band" titles (excepting "") is forward-compatible in "Rock Band 4" within the same system family (Xbox 360 downloads are usable in the Xbox One version and PlayStation 3 downloads are usable in the PlayStation 4 version) at no additional cost.