The songs featured on the posthumously-released Aviici album, Tim, were "75 to 80 percent done" when the Swedish producer/DJ died last April, in Muskat, Oman, according to the New York Times.
Avicii's real name is Tim Bergling, hence the album title.
Albin Nedler, Kristoffer Fogelmark and the singer Aloe Blacc are among the musicians who worked on the record, which is titled after Avicii's real name, Tim Bergling.
"He had a completely different way of playing piano and keyboard," Nedler said, referring to the song SOS, which is a highlight on the album. "As a result his fingers would sometimes strike an unusual key, which added to his unique sound."
Nedler and Fogelmark approached singer Blacc after discovering that Avicii had written on a note that he wished to record with him again, as reported by Rolling Stone. They had worked together on the 2013 hit, Wake Me Up.
Tim will also include contributions from Salem Al Fakir and Vincent Pontare.
Coldplay's Chris Martin sings on the song, Heaven, while Blacc sings on SOS.