OK... relatively new for serious music i suppose...

This was realized (audio simulation) in GB, although I have performed it on the organ (Pasi Opus V) numerous times...

This (audio version) includes a soprano singing 'oh' on the solo line at points. (there is an alternate melody that can be played on a solo soprano woodwind or string, which you can also hear in the higher registers)

If anyone is interested to purchase this, I will put it on my website... I charge $5 for solo organ pieces, and the license lasts for as long as you are alive to perform it. All files are in PDF format... if you lose the PDF, I will resend it to you as long as I am alive.

http://myopus.com/preview/koerberPreludeII.mp3