As long as we're on the subject of music composition, I'm just wondering, how do you guys compose? Do you start with a melody and then expand, or do you just sit down and start playing?
"Starting with a melody" is much trickier then you might think.
Unless you are writing a set of variations on an already existing theme, then you don't even start with a melody. You start with absolutely nothing.
Getting this initial "melody" out of nothing is the most difficult part of the composition process. What's worse, the composer have virtually no control over when or where the right theme will pop in his mind. You can go for years without a single idea, and then - bam! - the kernel of a masterpiece appears in your mind our of nowhere. Usually, it happens when you least expect it - I came up with the first theme for my last concerto on the way to the groceries store...
Anyway, once I have a theme (which includes both melody and harmony), the rest comes easily by playing around at the piano. If the piece is long and/or complex, then the entire procedure must be repeated more then once in order to complete the work.
Again, my concerto serves as an ample example of this: I wrote the exposition and the recapitulation of the first movement within a week or so, but went completely blank when trying to write the development. Only a month later did I get an idea for the development section (again, when I least expected it). Once the idea surfaced, it took me only 3 days to complete the development section!
It has been nearly six months, and I'm still waiting for a good idea for the second movement... No luck, so far. I'm telling you, this composing thing is very frustrating.