I've just posted what may be a unique experiment on this forum, namely a collaboration between two forum members; me, the composer, and Haydn, who created a MIDI realization of the score.
Back in 2001, I wrote an orchestral work as a season-opener for the Terre Haute Symphony Orchestra, which I called "The Starry Messenger." I posted a PDF of the score on my website shortly after.
A few months ago, Haydn let me know that he'd downloaded the score and had decided to create a MIDI realization of it. Apparently this is what he does for fun!
He sent me the result a while ago, and with his permission, I've posted it on my website. This whole thing came as a pleasant surprise to me. I was really impressed with Haydn's work, and flattered that he thought my score was interesting enough to justify all that work.
The Starry Messenger (MP3; 9578 kb).
And here's the score if you want to follow along.
I'll let Haydn chime in about the production when he has a chance. Suffice to say, most of the instruments are GPO, along with a few other libraries.