 The second album , Barrett , was recorded more sporadically than the first , with sessions taking place between February and July 1970 . The album was produced by David Gilmour , and featured Gilmour on bass guitar , Richard Wright on keyboard and Humble Pie drummer Jerry Shirley . The first two songs attempted were for Barrett to play and / or sing to an existing backing track . However , Gilmour thought they were losing the " Barrett @-@ ness " . One track ( " Rats " ) was originally recorded with Barrett on his own . That would later be overdubbed by musicians , despite the changing tempos . Shirley said of Barrett 's playing : " He would never play the same tune twice . Sometimes Syd couldn 't play anything that made sense ; other times what he 'd play was absolute magic . " At times Barrett , who experienced extreme synesthesia , would say : " Perhaps we could make the middle darker and maybe the end a bit middle afternoonish . At the moment it 's too windy and icy " . 
