Hi,
After my questions about the safety of feeding two oscillators or more into a passive mult here is an example https://soundcloud.com/david-kellett-2/heterodyning-rubicons
The first two Rubicons have their double sine output going into the mult. They are tuned up into the supra audio range - what you hear is the difference tone. I'm only touching the fine tune knob. Later I put the other Rubicon in sine into the mult - but in LFO mode - you get a tremolo effect. I tried the Sawtooth but you get a nasty click from it in this configuration.