This evening I went ahead and added those new features to Tune Typing. Now, after typing a tune, you can use the left/right arrow keys on your keyboard to go back and forth to any given note. Once there, you can use the up/down arrow keys to change the note’s pitch.
If you have selected a note, then you can also build chords by playing another note on the keyboard. The new note will play at the same time as your selected note.
It’s still not fancy, but it gets the job done, and now it’s a little more useful. You can play with the new version here.
One more hidden feature for advanced users: If you hit RETURN, then the score data prints out on the Javascript console.