On macOS, the player does not support video resolutions lower than 640x480. Dolby Reference Player v3.1.0 Release Notes | PDF - Scribd
Provides bitstream information and channel level monitoring.
The Dolby Reference Player (DRP) is professional quality control (QC) software that supports playback of , Dolby Atmos, and other Dolby bitstreams. Official Download & Availability
Comprehensive Guide to Dolby Reference Player & Dolby AC-4 v3.1.0
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To test if the download and installation were successful, use a sample AC-4 MP4 or TS file.