They 'dubbed in' the music. = They 'dubbed' the music 'in'.
He was hired to 'dub' the dialogue for a foreign film.
Critics 'dubbed' him the new king of rock ‘n’ roll.
(..) I have an emergency brake. This wiII do fine, thank you. With the power vested in me... by the royaI crown of Genovia... I dub thee-- Artie Washington, San Francisco, ma'am. CLARlSSE/ Arthur Washington. And l dub thee-- (..)2001 The Princess Diaries