People who don't do jazz think it's black magic. But really, it's just a matter of getting used to it. It's fun to gamble. The trick is not to fall back on the things you've done before.
I don't even have a cell phone. I don't know how they work.
When I composed, I heard my music played by the orchestra within days of completion of the score. No master at a conservatory, no matter how revered, can teach as much by verbal criticism as can a cold and analytical hearing of one's own music being played.
A Beethoven symphony should be rehearsed like chamber music, only for a lot more people.
I have a great many shortcomings, but writing for something on time has never bothered me.