861v4, 861v3.5 and G68 share the same decoder modes and DSP presets. This is at the point in time where they incorporate THX UltraII Cinema and Dolby PLIIx. Basic Preset structure - why have we changed it? In older products a Preset was linked directly to a type of audio stream. E.g. “Digital” was a Preset for Dolby Digital multichannel streams only, “Dig THX” added THX extensions to the basic Dolby Digital mode. Adding extra processing modes, such as Dolby PLII and THX Surround EX, was beginnin