This set of free VSTi's are two of the very best FREE (Donationware) VSTi's available. They emulate the original instruments incredibly well. Pure 60's tone, all done very, very authentically. I've opted to use Martinic's ComboV VSTi on the latest track that I'm working on. I chose it over the couple of sample libraries that I have. (N.I. Vintage Organs, Hollow Sun VoxConti).
This delightful little organ clone uses next to ZERO CPU and sounds very, very realistic. ComboV is to Vox Continental Organ emulation what GSI's VB3 is to Hammond B3 Organ. Amazingly good, folks. If you're ever looking for truly authentic Vox Continental sound, then I highly recommend that you give this VSTi an honest listen.
BTW, the ComboF Farfasia clone VSTi is just as good. *wink*
The drawbar settings really 'nail' the original hardware's tones and response. When "amped" through a good amp sim, this virtual machine really comes ALIVE. (Personally, I'm using Guitar Rig 5 Pro's AC-Box and the Roland RE-201 Space Echo "Tape Echo" to accomplish this.)
I've tried out other freeware VSTi's that are supposed to be clones of the old Vox Continental organ, but they were so sterile and synthetic sounding - a.k.a. "Cheap". This VSTi, however, is rich and organic sounding. (No puns intended). The vibrato is configurable and very pleasant sounding You can keep this instrument sounding controlled and musical, or take it all the way to 60's psychedelia with a few mouse clicks.
It's drop-jaw easy to place this instrument in your mix. It pans nicely and yet remains very full-sounding. It's tonal quality is very easy on the ears. Even when using a strong upper range drawbar setting, the sound remains warm and musical. You won't hear any brash, harsh synthetic cat scratching sound with Martinic's two organ clone VSTi's. Both the the Combo Model V (Vox Continental) and also the Combo Model F (Farfasia) sound deliciously authentic and true to the "real" thing. I've carefully compared this VSTi to sampled Vox C. sample libraries, and to be honest, I'll reach for this one each time.
You may court different gals, but when you find the 'right' one, ya marry her. Well, if Vox Continental organ clones were ladies, this is the one I'd propose to. ... lol.
You can hear this terrific organ clone on the 3rd track of my upcoming Gospel album: "The Gospel. .. Just a Little Bit Louder".