It's not strictly a Harpsichord, either, heh. This recording uses a patch I made specially for the Aether Chronicles OST for one of the instruments I wanted to have in the game. We never came up with a proper name for it, but it's been saved on my PC as "Harpsianochord".

The resulting sound is what you'd get if a Harpsichord could sustain and change velocities like a Steinway D.

There are other minor changes I made to the sound to try and make it a bit more 'Lutey', but they never really came across so IIRC I scrapped them from the final patch. I'm trying to figure out how to describe the sound so I can work it into my book, hehehe.
This piece originally started out life as a Piano Sonata, but as it progressed I scrapped the Sonata form and turned it into the vaguely Rondoesque piece that it is now. There were originally strings around it, but I felt they detracted from the beauty of the line.
This piece modulates. A lot. It starts in C minor, then works its way somehow into C# minor, then it manages to get to B minor, and I'm not sure where to go from there, heh.
This is unfinished, hence why it ends so suddenly. There's going to be at least one other section after the final one.
Oh, and most of it is physically impossible to play for most people. Rachmaninow could probably manage it, but meh. I certainly can't play most of the right hand. It's been written to sound nice, not for performance. Although I'm sure with a few years practice someone one day could probably play it.
So yeah, anyway...
Fantasia for Harpsianochord [2:07ish]
I've attached a MIDI file for those who like to follow a score of a sort. This should import into Sibelius and Finale fine.