Rolling Stone is reporting that a dozen previously unreleased Pink Floyd albums quietly surfaced on streaming services this week. All of the concerts occurred between 1970 and 1972, covering the period in which the band released Atom Heart Mother (1970), Meddle (1971), and Obscured by Clouds (1972), and had already begun playing songs from Dark Side of the Moon (1973).

One recording — a March 1972 Tokyo gig — features a near-complete performance of Dark Side in sequence, a full year before its release. The songs are loose and jammy in a way not heard on the studio version. Many of the record’s well-known sound effects are completely different and “Money” features some unusual percussion.

All of the recordings are copyrighted to Pink Floyd Music Ltd., suggesting these are official releases from the band. Their release may be timed to extend the rights of the recordings. In 2013, a rep for Sony explained Bob Dylan’s release of uncirculated music by telling Rolling Stone, “The copyright law in Europe was recently extended from 50 to 70 years for everything recorded in 1963 and beyond. With everything before that, there’s a new ‘Use It or Lose It’ provision. It basically said, 'If you haven’t used the recordings in the first 50 years, you aren’t going to get any more.'"

Read the complete report here.

Ultimate Classic Rock has published a list of the live albums. Check it out below.

They Came in Peace - Leeds University 1970 Washington University
Live at Grosser Saal, Musikhalle, Hamburg, West Germany - Feb 25, 1971
Mauerspechte Berlin Sportpalast - June 5, 1971
Live, Lyon 12 June 1971, Tokyo - March 16, 1972
Live in Rome Palaeur - June 20, 1971
Amsterdamse Bos Free Concert - June 26, 1971 
Live in Montreux - Sept 18 & 19 1971
KB Hallen, Copenhagen - Sept 23, 1971
KB Hallen, Copenhagen, Vol II - Sept 23, 1971
Over Bradford Pigs on the Groove Bradford University - Oct 10, 1971
Embryo, San Diego - Oct 17, 1971
The Screaming Abdabs Quebec City - Nov 10, 1971