George, there is no minimum amount of ram. If you process only small recordings (low MP), then having 4GB may be enough. But if you process large recordings, you may find that you need a minimum of 8GB to be able to process them without crashing.
I suggest to have 16GB+, but it is certainly not required.
Having a page file on SSD may help a bit, but nothing beats having 'real' ram memory available.
About CPU cores; more is better. Hyperthreading helps a bit (+-15% maybe), but 'real' cores are of course better. I'd like to test with new Ryzen in a month or so, and I suspect the 8 core version (16 hyperthreading) should work very nicely. Again though, there is no minimum. It will work with just one core, but especially when using >10 alignment points, AS! scales very well when more cores are available.