CC, this is really good stuff. thank you for making it available to us.
I am enjoying reading your thoughts about Mental Play. I buy that completely. A few years ago I bought a Jamie Aebersold DVD about jazz improvisation, and one of the things he stressed was singing the improv line as you were playing- basically an effort to get your fingers to follow your brain. his point was you never sing a wrong note, your brain understands whats in the pattern. to me, the challenge is to link the sounds in your head to the specific keys on the keyboard, once you have that chromatic scale "voiced" mentally, it would seem that you could create music in your head quite readily. I recently watched "Amadeus" again (for about the 50th time...) and the scene where he is composing sitting at his table, without an instrument in sight, has always made an impression on me.
I have found a good exercise to be composing melody or improv lines on Finale without using an instrument, and then playing them back via the computer to see how it sounds.
your point about your brain being more important than your fingers also emphasizes, at least to me, the importance of dynamics. which, also to me, completely validates PTQ as a proper digital instrument vs all the layered sample programs out there which completely defeat that linkage...
again, thanks!!