Mark, for this one add in 3a:

"3a. You scrathced around at the piano ending up with a mixture of live tape recording and odd jottings on paper before attempting the initial MIDI recording which cobbled all these together."

But just to be contrary, "The Bold Navigator" on http://music.download.com/internetopera was MIDI improvisation, fiddling and cut and paste from start to finish. The lyrics were written to fit the music. The music started off as nothing to do with the opera, indeed predated it, but was nicely suited to the "arthritic jig" called for in the developing play!

Regards
Tim