yes thanks @Chowderr , that's for the background sound:

/**
   * This is the background sound in the call. Default for phone calls is 'office' and default for web calls is 'off'.
   * @example "office"
   */
  backgroundSound?: 'off' | 'office';

But I search this option instead: https://cdn.discordapp.com/attachments/1211484481848873020/1249652520238977044/Screenshot_from_2024-06-10_11-12-28.png?ex=6668151a&is=6666c39a&hm=65178680fb7cc39a831e217ae61b15bb09b1514b84d1eafaaac315c3380dc84a&