Sir Mick Jagger's supergroup has been forced to trim the length of their tracks after recording "hour-long" jamming sessions, according to singer Dave Stewart.
The pair has been creating new material with singer Joss Stone, Oscar-winning composer A.R. Rahman and reggae superstar Damian Marley under the name SuperHeavy.
The album is set to hit shelves in September (11), and Stewart reveals editing has been the group's main priority ahead of the release.
Speaking on Britain's The Andrew Marr Show, he explains, "It's a whole fusion of different styles - Damian Marley's Jamaican, A.R. Rahman is Indian and Mick's from England, so am I, and Joss is from Devon (England).
"Some of the first songs were an hour long, we had to edit them down. We wrote about 30 songs and then we brought it back down to 16 and the album's out in September."