I had a Yamaha DX7-IIFD, but was not to big on FM syntheasis( Frequency Modulation, same as used for FM Radio) Grannular is farily new concept, but I don'think It has teken off yet. Analog on the other hand just reffers to the synthesizser made prior to 1980. Basiccly they are synths that use electrictiy instead of micro chips in digtal ones. (ex: Minimoog analog, DX7 digital)

There is also Rolands LA or Linear Algorithmic synthesis. That one I have no idea myself how that works. I think it is on the same princeaple as FM. Mathmaticlly speaking. But don't hold me to that.

Actually I own analog gear. But I am going to sell my AX-60 and Omni.