I have never used VArranger, but it seems to be pretty sophisticated. I can imagine the old LS is no match for it. I am not much of an arranger player, I enjoy playing a midi accordion using a variety of sounds on multiple midi channels. I was thinking maybe I could use VArranger for that purpose, but I figured that for the price of VArranger, I could do better with VST plugins a good host.

I took a look at my LS USB hard drive. You are right. It has lots of Yamaha Mega Voices. About 14 Gb all in sf2 format, and a whole bunch of other stuff. Do you happen to know the best way to use sf2 files in a VST host?
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"You Shall Know the Truth, and the Truth will set you free." John 8:32