"Headphone Mix is a special effect unit which suitable for those who make their music on a headphone monitor system. It combines environment simulation system, frequency compensate system and HRTF technologies to emulate the speaker feelings on your headphone. Headphone Mix is provided as a VST effect unit under Windows or an Add-on for Sound Magic Supreme Pianos."
A complete environment simulation system
Three band Frequency compensate system
3 sliders to control the effect depth
In-built HRTF algorithm
Up to 32Bit/384KHz resolution
Source via Music Informatory