VidRhythm, Harmonix's first new IP since Dance Central, is an iOS app, the Rock Band developer has revealed.
"The VidRhythm project has a tiny team that's doing our very first project in this space," he explained.
He was unforthcoming on precise gameplay details but apparently it's more of an app than a full game.
As discussed earlier this month, the studio is in the midst of a creative purple patch following its split with former owner Viacom. As well as Dance Central 2, Rock Band DLC and VidRhythm, the developer has a number of other secret projects in the oven.
"As we've been in development on Dance Central 2 we've also been in development on a bunch of new ideas," exec Tracy Rosenthal-Newsom told Eurogamer.
"It's just been terrific to see the company get back to the core collaborative design process that we have Ė putting small games together, making prototypes and thinking up really innovative gameplay. We're super excited to see what comes of that in the future."