Gilmour confirmed details of his "Arnold Layne" single on his official website, dedicating the release to Barrett, who died this summer of pancreatic cancer.
The material consists of an acoustic take on "Dark Globe" plus two versions of Pink Floyd's first-ever single, "Arnold Layne," all recorded at Gilmour's shows earlier this year at London's Royal Albert Hall.
One features David Bowie on vocals and the other Richard Wright from Pink Floyd. Both tracks were initially written by Barrett.
The songs will all be available to download from Christmas Day but will also be released to shops in December.
Meanwhile, it was revealed last week that Barrett left around 1.2 million to his family in his will. He died in July at the age of 60.
Syd Barrett's fortune revealed
May 22, 2007 2:00 pm PDT
Syd Barrett's estate has been valued at almost $3 million following his death last year. Official documents released this week confirm that the former Pink Floyd enigma's financial legacy totals $3 million, which has been distributed with...
Roger Waters takes Floyd fans to "Dark Side"
Oct 11, 2006 11:23 am PDT
"OK, are you ready for this?" a clearly tickled Roger Waters asked the red-eyed crowd after an intermission. "So are we." About 18,000 minds began to wander -- side to side, back in time -- as the dozen players onstage re-created one of ...
Pink Floyd founder's house attracts big interest
Sep 12, 2006 3:25 am PDT
The former home of Pink Floyd founder Syd Barrett, who died in July, has attracted huge interest from potential buyers undeterred by the reclusive singer's patchy home improvement efforts. Dozens of people have viewed the 1930s house, wh...
Pink Floyd, Bowie Remember Syd Barrett
Jul 12, 2006 10:00 am PDT
Pink Floyd and David Bowie have led the tributes to Syd Barrett, who died last Friday. Barrett is now confirmed to have passed away at his home in Cambridge at the age of 60, after losing his battle with cancer. He had lived as a virtual...
Jul 12, 2006 6:42 am PDT
Pink Floyd has lost its "crazy diamond." Syd Barrett , the brilliant, erratic catalyst for Floyd's early success, "died peacefully at home" last Friday at 60, according to his brother. The musician had been in ill health for years, ...