ADM Files

Nuendo allows you to import Audio Definition Model (ADM) files, for example, complete Dolby Atmos premixes, for further mixing and editing. You can export your own Dolby Atmos mixes as fully compliant ADM files in Broadcast Wave Format (BWF) format.

You can import ADM files in Broadcast Wave Format (BWF), such as those exported from the Dolby Atmos Production Suite, Dolby Atmos Mastering Suite, or Cinema RMU (Dolby Rendering and Mastering Unit), into new or existing projects, preserving the hierarchical structure of the ADM file and all pan automation. The imported ADM can contain channel-based beds and object-based audio. Nuendo supports different ADM file structures containing the elements audioProgramme, audioContent, audioObject, and audioChannel, according to Recommendation ITU-R BS.2076-1 by the International Telecommunication Union.

Figure 1. Supported ADM file structures

Cross-references between elements are also supported.

When importing ADM files into your Nuendo project, the following applies:

  • Multi-channel audio from ADM files is extracted and split into mono files.

  • Multi-objects are split into the corresponding number of mono objects, containing their own panning metadata.

  • Folder tracks are created to represent the file elements audioProgramme, audioContent, and audioObject. Each folder track contains the associated sub-elements.

  • Folder tracks that represent an audioObject contain the mono audio tracks created from the channels of the object.

    Note

    If an audioObject only contains one channel, no folder track is created, but the mono track is created in the associated parent folder track or on the root level in the track list.

  • Cross-references within the ADM file structure are replaced by copies of the corresponding files.

  • Tracks with object audio are automatically assigned to VST MultiPanner, preserving existing pan automation.

  • Tracks with bed audio channels are not automatically assigned to a panner.

Exported ADM BWF files contain the complete object structure with all metadata required for re-rendering on a Dolby Atmos playback system.