well, I haven't seen your recording, but obviously not only the melody will be in the composer because you have used it as a pattern mode sequencer. If you have any of the Americana software series that I mentioned then the solo composer variation will be exactly the same as the principle of your recording having a complete melody and backing "mini-song" multitracked in the composer alone.

Here the melody and backing were played into the composer as a pattern mode sequencer, you can use the composer just like the sequencer except that you are limited to 16 bars in each variation.

You can obviously multitrack your song in the composer in any key so it plays back in that key. But to digress for a moment, the solo variation that I mention has another interesting use in that the "mini-song" is recorded in base C major because the solo variation was meant for real time apc playback too. So if you played the variation in C you heard the melody, backing and chord progression of the song as recorded, but if you played the variation in F or G the start and end keys and all the intervening chord progressions of melody and backing were automatically transposed for you during live apc play.

Since your recording is 42 bars, more than one variation could be used, if the full melody line could not be achieved by repeating parts of the 16 bars in a single variation, or obviously intro, ending, and fill could also be used for 16 bars of the song each. In fact if you total up the number of independant bars available it is way beyond my previous guess if you add in custom etc, although with very complicated arrangements you might end up hitting the note limits using all available bars in all variations, intros, endings, fills & banks etc.