overdubs

/ˈoʊvərˌdʌbz/
verb
  1. To record additional audio (such as vocals or instruments) onto an existing recording.
    • The singer decided to overdub a harmony part to make the chorus sound fuller.
    • They used a computer to overdub sound effects onto the movie's dialogue.
    • In the studio, the guitarist overdubbed a second solo over the original track.
noun
  1. Additional audio tracks that are recorded onto an existing recording.
    • The final song had several overdubs, including backup vocals and a string section.
    • He listened carefully to the overdubs to make sure they were in sync with the original beat.
    • The engineer removed one of the overdubs because it made the mix sound too cluttered.