The producer, who last worked with the band on their 1999 album 13, confirmed that he is in the studio with both Damon Albarn and Graham Coxon in the coming months.
In a tweet to World Circuit Records about its act Fatoumata Diawara, Orbit wrote: "I just found out that [Diawara] has done tracks with Damon A, who I'm in the studio with from Wednesday!"
To further support the idea that Orbit is working on a Blur album, rather than one of Albarn's solo projects, he later tweeted to Coxon: "Hi Graham! Loving the guitars you laid down! Vocal session March 3!"
Despite some of the band's members recently admitting that they meet up regularly and record together, there has been no official confirmation that a new studio album is in progress.
Blur will receive the 'Outstanding Contribution To Music' accolade at next month's Brit Awards in London.
> Blur are an important band, says Brit Awards 2012 host James Corden
Watch the music video for Blur's 'Girls And Boys' below: