Rock Band developer Harmonix on Friday announced that its upcoming Amplitude game for PlayStation 3 and PlayStation 4 has been delayed. Previously scheduled to launch this March, the rhythm game is now due to arrive sometime this summer, Harmonix explained in a note to Kickstarter backers.

"This is our first time working on PlayStation 4, and it's been a big learning experience for the team," Harmonix said. "We've put a lot of work into our proprietary engine to support some of the new, awesome content we're bringing to the reboot. These factors combined have bumped production out a few additional months."

Right now, Harmonix said it is making "solid progress" on Amplitude, noting that it looks forward to sharing more details about the game in the coming months. Harmonix also teased that it has "exciting plans" for PAX East in March, though these were not specified.

The developer also said that it is using the extra development time to polish Amplitude's multiplayer mode, which was playable at PlayStation Experience in December, and wasn't quite where Harmonix wanted it to be.

"Thanks so much for your continued love and support," Harmonix said. "We've hit the ground running upon returning to the studio after the holiday and look forward to getting Amplitude in your hands as soon as we can."

The new Amplitude game was successfully funded on Kickstarter last year, netting more than $840,000 from more than 14,000 backers. For more, check out GameSpot's interview with Harmonix about why the game is only coming to PlayStation and our hands-on coverage from PlayStation Experience.