In a HardTalk Extra interview screened on 13 January, Gavin Esler speaks to Roger Waters of progressive rock band Pink Floyd.
Roger Waters performs at Live 8 in 2005
Roger Waters was the bass player with Pink Floyd, one of the best known rock bands in history.
It produced two of the world's biggest selling albums, The Wall and Dark Side of the Moon.
Pink Floyd delighted fans last year with a reunion performance at Live 8 drawing a line under years of acrimony.
Waters has now written an opera based upon events surrounding the French Revolution.
HARDtalk Extra can be seen on BBC World at 0430 GMT, 0830 GMT, 1130 GMT, 1530 GMT, 1930 GMT, 0030 GMT.
It can also be seen on BBC News 24 at 04:30 and 23:30.