“On the song 'Step,' the chorus is Ezra is singing into my laptop with the laptop microphone, and you can hear the trains going by my apartment, but we liked the quality of that recording.”

American musician, record producer, and songwriter

Rostam Batmanglij, known professionally as Rostam, is an American musician, record producer, and songwriter. He first came to wide attention as a founding member of Vampire Weekend and as the producer of the band’s first three albums. He also records as a solo artist and is a member of the electro-soul group Discovery. His work spans performing, writing, and producing, and he produced Vampire Weekend’s Contra, his first number-one album, when he was 26.