David Crosby has been Tweeting about the forthcoming Crosby Stills Nash & Young live album, describing it as “unbelievable”.

CSNY have long been rumoured to be working on a live album taken from their 1974 tour.

Speaking to Rolling Stone in June 2011, Graham Nash said, “We recorded nine of the 35 stadium shows we did. We have about 42 songs and we’re busy mixing them. We have about 12 to 15 mixes under our belt. We’re talking to Neil about the resolution he wants everything at. Because of the world Neil is in, he wants it at the highest possible – which is always advisable.”

Last July, Neil Young fansite, Thrasher’s Wheat, reported the set would consist of three CDs and a DVD.

Meanwhile, Crosby took to Twitter over the Easter weekend, to post news about what he’d heard from it so far.

“Heard one cut off of the CSNY 1974 stuff that Nash and Stanley Johnston and Joel Bernstein are mixing …unbelievable” he posted on March 31. A little while later, he followed it up with: “It’s going to be ….may well be the best live record ,certainly of us ..maybe you ever heard”.

The CSNY live 1974 album is rumoured for a release in 2013. It will be the first CSNY release since 2008’s Déjà Vu Live, recorded on the 2006 Freedom Of Speech tour.

Crosby Stills & Nash will be touring North America and Europe later this year, including two dates at London’s Royal Albert Hall on October 8 and 8.