[LAU] cello-like synthesizer?

Hi LAUs, sorry, maybe it's well known, but is there a synthesizer (or however it might be called) that more or less sounds like a cello? (I should dig by myself, but I am very bad at that when it's not about finding programming related stuff.) I can edit/modify/compile/debug things, so even ultra experimental/research/half working stuff is very welcome. I am planning to write a little program to detect movements of my two hands with a little camera attached to the laptop I have here and I thought I could, I don't know, send midi events or whatever to a synthesizer (or whatever) and have some audio output that would more or less sound like a cello (I love cello). Or any string instrument that you play with a bow if cello is too specific. To get the idea: one hand would go up/down and it would be translated as bow movement. The more on the right the louder the sound. The other hand controls the pitch in the vertical direction and another parameter ("metallic" sound let's say) in the horizontal direction. Visual data sampled at the frequency of the camera. Colored gloves to quickly find the hands in the image. Well, pretty basic stuff. Thanks, Cédric.