Advanced Dynamics consists of multiple elements:
- Auto EQ and Bass EQ
- Speech detection, allowing different processing (less bass enhancements for example) for speech vs music.
- Upto 4 AGC bands instead of 2
- Dynamic attack and release times for all compressors and AGC
- Progressive ratios for all compressors
- Progressive release behavior for all compressors
Auto EQ adjusts the sound before the AGC without compressing it. This makes it possible to have a much more consistent output without sounding processed. Since it doesn't compress the audio, it doesn't add density and doesn't cause pumping or breating. Auto EQ can achieve the same spectral consistency that multiband compression can, without those side effects. It does not affect audio levels, only the spectrum. See the video on the right.
Dynamic attack and release times means that the speed at which the compressors and AGC act is adjusted based on the input. If the input is very dynamic, the speeds are increased, if the sound is already very constant, the compressors back down to not reduce the dynamics further. A sudden loud sound is handled gracefully, both when going down and when coming back up, to greatly reduce any audible gain riding.
Progressive ratios and makes it possible to have a different ratio in the compressors depending on how much they are pushing the level down. When it gets deeper, it gets steeper. So a very loud sound will be compressed more. Progressive release speeds up the release when the compressor is further down.
This video on the right shows the Auto EQ in action.