Downloadable content from previous Rock Band titles (excepting The Beatles: Rock Band) 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.I bought a ton of downloadable tracks for all the previous Rock Band games. 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. Starting from October 6, 2015, all music added to the downloadable content catalog is exclusive to Rock Band 4. Dates listed are the initial release of songs on PlayStation Network and Xbox Live. All songs available in packs are also available as individual song downloads on the same date, unless otherwise noted. The following table lists the available songs for the Rock Band series released in 2019.

Rock Band 4 was unveiled in March 2015, and released on October 6, 2015. The sudden release, along with a survey posted by Harmonix a few days later, hinted at the possibility of a new Rock Band game for eighth generation consoles. On January 12, 2015, Harmonix announced that it would release three new DLC songs for the PlayStation 3 and Xbox 360 versions of Rock Band 3 on January 13, 2015, the first in nearly 21 months. Harmonix previously announced in February 2013 that it would stop regularly releasing new DLC songs for the Rock Band series after Ap(with Don McLean's ' American Pie' serving as the 'final' song) in order to focus on other projects, ending over 280 consecutive weeks of weekly releases dating back to 2007. All songs that are available to Rock Band 3 are playable in Rock Band Blitz.

Users can download songs on a track-by-track basis, with many of the tracks also offered as part of a 'song pack' or complete album at a discounted rate. The Rock Band series of music video games supports downloadable songs for the Xbox 360 and PlayStation 3 versions through the consoles' respective online services.

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