Hi,
Read this first:
http://http://en.wikipedia.org/wiki/Ring_modulation
Now experiment with the ring modulator by only using pure sinewaves in both oscillators. See how the modulation alters the sound when one or both oscillators is pitched up or down (both course and subtle) and whether osc sync makes any sense.
Ring modulation has some relation with FM and just like fm, if you are using waveforms other than sinewaves, the sound rapidly becomes very harsh and unpleasant.
The intensity of ring modulation can in turn be controlled by an envelope or lfo (set this up in the mod matrix) to create some snappy effects.
M.