Conversation so far:
What is known about Syd Barrett during recording of his second solo album Barrett?
Sad Barrett's second album, Barrett, was recorded more sporadically than the first, with sessions taking place between February and July 1970
How was Barrett by Syd Barrett received?
Barrett was released in November 1970 on Harvest in the United Kingdom, but failed to chart
What is the highlight of the recording of Syd Barrett's album Barrett?
According to Jerry Shirley, Syd Barrett 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.
And what followed Syd Barrett's recording his album Barrett?
At times Barrett, who experienced synaesthesia, would say: Perhaps we could make the middle darker and maybe the end a bit afternoonish. At the moment it's too windy and icy.

Question: what did they do while working on atom heart mother?
Self-contained rewrite: What did Syd Barrett do while Pink Floyd was working on their album Atom Heart Mother?