... > Probably there are terms in between, like improvisers that think > quickly and composers that write their notes intuitively... ... mozart used to write two parts at the same time. he wrote quite automatically and despite his short life was the most prolific composer (though he did write a lot of fluff) he was also an agile improviser. like bach, he could improvise 4 part fugues. i can't imagine doing that. they are pretty difficult to compose on paper.