Topics covered in this article:
- Project settings
- Configuring devices
- Using the Dolby Atmos Music Panner
- Synchronization with the Renderer
- Template project
The Audio Units (AU) version of the Dolby Atmos Music Panner is used in Logic Pro to create a Dolby Atmos mix when connected to a Dolby Atmos Renderer.
In the General tab, set the project sample rate to 48kHz or 96kHz to match the sample rate set in the Dolby Atmos Renderer.
In the Synchronization tab, set the project frame rate to match the frame rate set in the Dolby Atmos Renderer.
- Select Dolby Audio Bridge as your output device in the Logic Pro X Preferences in the Audio tab.
Set the I/O Buffer Size to 1024 samples.
Using the Dolby Atmos Music Panner
- Insert the Dolby Atmos Music Panner on a track with audio or an instrument loaded.
- Assign the track to output 11.
- Establish communication between the Music Panner and the Renderer by entering localhost in the Renderer field – the connection status indicator should be green.
- Use the Object selection drop-down menu to select or enter Object 11.
- To create multiple Objects on different tracks, repeat the steps above, taking care to match the Object and output assignments for each instance of the Music Panner, e.g., assign Object 12 and set to Output 12.
Synchronization with the Renderer
In order to record a Dolby Atmos master file, the Renderer must be synchronized to Logic. The simplest way to set this up is to use a generated LTC .wav file on an audio track routed to Output 129 or 130 of the Dolby Audio Bridge.
There are a number of ways to generate an LTC files, and a quick Internet search for “How to generate LTC audio” will point to a number of solutions that will work. Ensure that this generated timecode matches the sample rate and bit depth of the project.
Once the LTC .wav file has been generated, create a new audio track by navigating to Track >New Tracks or pressing Cmd+Option+N. In the new track dialog, create 1 mono audio track with no Audio Input, and Audio Output set to Output 129.
Rename the track to LTC 129 and drag-and-drop the generated LTC .wav file at the start of the timeline.
In the Renderer, navigate to the Driver tab of the Preferences window and verify that External sync source is set to LTC over audio and LTC input channel is set to 129.
Toggle the synchronization button On, press Play in Logic, and verify that the Renderer is chasing timecode.
It is also possible to use MTC to synchronize the Renderer to Logic, though this is not best practice, as this workflow may result audio gaps, if using Punch Ins/Outs. Refer to the Logic documentation and online knowledge bases for more information on MTC output.
If using MTC, verify that the MTC output of the DAW is set to IAC Driver Bus 1 and that the Renderer External sync source is set to MTC and the MTC MIDI device is set to IAC Driver Bus 1.
The Dolby Atmos Music Panner comes with a template project for Logic that uses the Dolby Atmos Music Panner and the Dolby Audio Bridge. To open the template, create a new project. In the New Project window, navigate to My Templates and select the Dolby Atmos Music 64 Channel template.
This window is also where the project sample rate, frame rate, and I/O devices can be set. These can also be changed from the Project Settings menu after the project has been created.
The template project contains 10 mono Bed audio channels routed to outputs
1–10, 22 mono Object audio tracks (with the Dolby Atmos Music Panner on each track) routed to outputs 11–32, and 16 stereo Object audio tracks (with the Dolby Atmos Music Panner on each track) routed to outputs 33–64.
The template is a great place to explore and experiment with Dolby Atmos and Logic.