In each of the theme songs, the basic melody was used, but you may find that drums, orchestration, other keyboards, and brass instruments have been added to parallel the times.
Danny Elfman composed the score, with orchestration help from Mark McKenzie, and wrote the lyrics to all the songs and actually performed in most of them.
Live in Amsterdam - This live album was released in 2006 (along with Late Orchestration) and includes 22 tracks, plus two unreleased bonus tracks.
In Beethoven's orchestration there is almost always room for an independent viola part.
(The mechanical improvements by which horns and trumpets acquired a complete scale have revolutionized the nature of those instruments; and Wagner's orchestration, more than that of any other composer, has profited by this.