Harmonix issued the following statement:

We’re happy to confirm the news today that the sale of the Harmonix Music Systems, Inc. by parent company Viacom is complete. We appreciate all of your support, comments and warm wishes in the preceding few weeks.

Viacom and MTV Networks have been an amazing home for us over the past 4 years. It’s where we launched both Rock Band and Dance Central, worked with The Beatles, Green Day, AC/DC, The Who and thousands of other artists. We want to take a moment to thank everyone in that organization who helped make these awesome games possible.

We’re excited to be returning to our roots as an independent and privately owned studio. As for what it means for you, the DLC schedule marches on for Rock Band, we will continue our support of previously released titles and we’re hard at work on some unannounced projects that we think you’re going to be pumped about.

Thanks for your continued support and stay tuned for more information here on RockBand.com, over @RockBand on Twitter and at Facebook.com/RockBand.