The Rock Band Harmonies Project (RBHP) has been releasing upgrades to official Rock Band songs and DLC since 2012, and has been a proud sister project to C3 since our inception. A RBHP package interacts only with official Rock Band content, does not require Title Update #4, and doesn’t disable online play. Check it out!
This announcement was supposed to go out with the March 14 C3 release, but pksage messed up and forgot it two weeks in a row. This just means that the next RBHP release will be even sooner! Totally intentional. Yep.
The RBHP release from March 14 includes harmonies and keys upgrades to 22 songs, with content from espher, GreenPanda12, thomeval, and StackOverflow0x. Harmonies have been added to Nine Inch Nails 02, Warped Tour 02, and tons of singles, along with a Blink-182 keys chart.
Check out the full list below for more info, or go directly to the Rock Band Harmonies Project site to download these upgrades!

Rock Band Harmonies Project – March 14, 2014

Rock Band DLC 2008 Harmony Upgrades

• Foo Fighters – “New Way Home” (espher)
• Miranda Cosgrove – “Headphones On” (thomeval)
• Nine Inch Nails – “Burn” (espher)
• Nine Inch Nails – “Capital G” (espher)
• Nine Inch Nails – “Last” (espher)
• Ramones – “Teenage Lobotomy” (espher)
• Shinedown – “Devour” (GreenPanda12)
• Shinedown – “Junkies for Fame” (GreenPanda12)
• The Clash – “Complete Control” (espher)
• The Naked Brothers Band – “Body I Occupy” (espher)
• The Naked Brothers Band – “I Don’t Want to Go to School” (espher)
• The Police – “Truth Hits Everybody” (espher)

Rock Band DLC 2009 Harmony Upgrades

• Black Rebel Motorcycle Club – “Weapon of Choice” (espher)
• Dear and the Headlights – “Sweet Talk” (espher)
• R.E.M. – “Losing My Religion” (espher)
• The Devil Wears Prada – “Hey John What’s Your Name Again” (espher)
• Thrice – “Image of the Invisible” (espher)

Rock Band DLC 2010 Harmony Upgrades

• Disturbed – “Meaning of Life” (espher)
• Disturbed – “Voices” (espher)
• Silvertide – “Blue Jeans” (thomeval)

Rock Band Network Harmony Upgrades

• The Material – “Stay Here Forever” (GreenPanda12)

Rock Band DLC 2010 Keys Upgrades

• Blink-182 – “Dammit” (StackOverflow0x)

Chart Fixes

• Disturbed – “The Game” – Missing: Vocal tonic information for RB3. (espher)

Revisions to Previous Releases

• Foo Fighters – “Hey, Johnny Park” – (HARM) (GreenPanda120 – Changed harmony part pitching.
• Ramones – “Teenage Lobotomy” – (PG) (columbo777) – Integrates harmony chart (new in this release).