Spector 's `` wall of sound '' approach to record production -- the layering of instrumental tracks and percussion that underpinned a string of hits on his Philles label -- changed the music world in the 1960s . Phil Spector smiles broadly in a July 2013 prison photo . The killer-producer looks sad in an October 2013 mugshot . Spector has 14 more years to serve for killing actress Lana Clarkson . Hide Caption 2 of 23 Photos:
Phil Spector smiles broadly in a July 2013 prison photo . The killer-producer looks sad in an October 2013 mugshot . Spector has 14 more years to serve for killing actress Lana Clarkson . Hide Caption 2 of 23 Photos: