His creative relationship with Reed was integral to the sound of the Velvet Underground 's first two albums , The Velvet Underground & Nico ( recorded in 1966 , released in 1967 ) and White Light\/White Heat ( recorded in 1967 , released in 1968 ) .
He played on two of their albums The Velvet Underground & Nico ( 1967 ) and White Light\/White Heat ( 1968 ) .