Gullfoss does not follow a traditional EQ approach. Instead, it adjusts its frequency response up to to make hidden details more audible without introducing phase issues.
Adjusts the perceived loudness of low-end frequencies relative to the rest of the spectrum. Soundtheory Gullfoss 1.10.0
Skews the results toward a brighter or darker overall tonality. Gullfoss does not follow a traditional EQ approach
Soundtheory Gullfoss 1.10.0 is a significant update to the plugin that uses a computational auditory perception model to identify and resolve frequency masking in real-time. This version introduced the Gullfoss Master edition, specifically tuned for the highest possible audio quality and a lower noise floor during the final mastering stage. Key Editions in Version 1.10.0 Skews the results toward a brighter or darker
A high-precision edition with an extended auditory model designed for mastering. It uses more CPU to provide even finer parameter control and a lower noise floor, while maintaining the same 20ms latency as the standard version.
Users can drag red markers on the visual graph to restrict Gullfoss's processing to a specific frequency range. Installation & Compatibility Gullfoss Intelligent EQ Review - TapeOp Magazine