All the keys you are

Continuing with the famous tune 'All the things you are'.

Here, I'm hoping to motivate pianists to play things in multiple keys.
Here's a folder where I stored the tune in several keys. I played just the melody, doubled in the left hand. Playing with the left hand is a good way to memorize the melody while giving the left hand a good workout.

Then I played the tune 2+2 style, meaning 1-3, 1-7 in the left hand, while playing melody + 3 or 7 in the right hand.

http://www.box.net/shared/m3f03ev52d

Nothing really fancy here, but a couple of things are worth noting:
- Don't transpose on paper.
- 'All The things you' are uses a lot of 3rds. It's a good quick way to find out the harmonies.
- After a while, you stop thinking and start using the ear to find both the melody and the harmonies. "All the things you are" is a good tune because it modulates a lot, but uses fairly simple chords and lots of two-fives. The only 2 unusual chords are (in Ab), the C7+ and the Bdim. That's all that needs to be memorized really. The rest can be worked out by ear.

Keep practicing.