This is written for clavier, two violins, and cello. I played the clavier part with the Hohner Pianet N sound and all of the string parts with the mellower of Nord's two Hohner String Melody II samples. I changed the dynamics in the Pianet part just by how hard I hit the keys (although the instrument doesn't have a large dynamic range), but for the strings, I used a volume pedal.
I shot video of the Pianet part but not the string parts. They would have made editing the video more difficult, and I thought they wouldn't be very interesting to watch anyway.