The first sound demonstrates the use of LFO and filtering on each key. Note: I still do not understand how I was able to do this. As far as I can tell, I might be able to play as many notes as I want with varying LFO speeds. But how can this be since there are only 3-4 dedicated LFOs? The second sound is based off the choir sound from the Roland SR-JV80-02 Orchestal Expansion board. It just increases the volume and opens the filter for each key pressed.