 Voice recording sessions always include a full cast of actors , which Kenny describes as " getting more unusual " . Kenny said , " That 's another thing that 's given SpongeBob its special feel . Everybody 's in the same room , doing it old radio @-@ show style . It 's how the stuff we like was recorded " . Series writer Jay Lender said , " The recording sessions were always fun ... " For the first three seasons , Hillenburg and Drymon sat in on the record studio , and they directed the actors . In the fourth season , Andrea Romano took over the role as the voice director . Wednesday is recording day , the same schedule followed by the crew since 1999 . Casting supervisor Jennie Monica Hammond said , " I loved Wednesdays " . 
