DTS-HD Master Audio is a lossless audio format that supports up to 7.1 channels of audio at a bitrate of 24.5 Mbps. It is the highest-quality DTS audio format available, and it is used on Blu-ray discs and other high-definition media.
The main difference between DTS-HD Master Audio Essential and DTS-HD Master Audio is the bitrate. The higher bitrate of DTS-HD Master Audio allows for more accurate reproduction of the original audio signal, resulting in better sound quality.
Additionally, DTS-HD Master Audio supports up to 7.1 channels of audio, while DTS-HD Master Audio Essential only supports up to 8 channels. This can be an important factor for users who have a 7.1-channel surround sound system.