Irish flautist Aisling Agnew and Scottish guitarist Matthew McAllister (Agnew McAllister Duo 15 years+!) perform Libertango by Astor Piazzolla (1921-1992) at the 2016 Classical Guitar Retreat (CGR). This comes via McAllister’s great YouTube Channel. The CGR looks amazing so gear up for it next year: “The ninth Classical Guitar Retreat takes place in the summer of 2017 at the Cathedral of the Isles on the Island of Cumbrae off the west coast of Scotland.”