Hi. I am sure these are explained in documentation somewhere, but I cannot find it. I obviously know what VSL and NotePerfomer are since I bought them, 
but what are these different variations of the included Dorico playback engines? For example, what is GASE? I guess HSO is an upgraded version of HSSE, but I don’t know for sure. Are these all defined somewhere? Thank you!
GASE = Groove Agent SE
HSSE = Halion Sonic SE (a free sampler, I think!)
HSO = Halion Symphonic Orchestra
(Elements) = comes with Dorico Elements
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HSO = HALion Symphonic Orchestra
HSSE = HALion Sonic SE
Thank you! So, for normal symphonic stuff, I guess HSSE+HSO (Pro) makes the most sense since sampling and Groove Agent probably wouldn’t be needed.
That’s right