From the BBC News 27/4/18

Super group ABBA are back recording again!ABBA announced this Friday that the Swedish pop group reunited in the studio to record their first new songs together in over 35 years. The recording session yielded a pair of new tracks, including "I Still Have Faith in You," which will premiere in December as part of ABBA's previously announced "groundbreaking venture that will utilize the very latest in digital and virtual-reality technology."

"The decision to go ahead with the exciting ABBA avatar tour project had an unexpected consequence," the band said in a statement Friday.

"We all felt that, after some 35 years, it could be fun to join forces again and go into the recording studio. So we did. And it was like time had stood still and we had only been away on a short holiday. An extremely joyful experience!"

In October 2016, ABBA aligned with American Idol creator Simon Fuller to create a stage show that utilized the emerging VR technology to bring the quartet back to life as opposed to the now-industry standard holograms.