It’s so hard to watch this episode knowing that she’s now missing, presumed dead. With the presumption heavily on dead. I don’t think they’ll find anything.
He's using a synthesizer. You create your own sounds with it, provided you know how to use it. The keyboard, if you want to be picky, is just a controller for the synthesizer itself. I hope you haven't gone and bought a keyboard thinking it was a synth :C