Trans-Siberian Orchestra was formed in 1996 by Paul O'Neill who immediately approached long time friends and collaborators Robert Kinkel and Jon Oliva to form the core of the writing team.
While producing and writing for a number of years with various rock groups Paul was always looking for ways to make the music have greater and greater emotional impact. He tried to write the music that was so melodic it didn't need lyrics. And lyrics that were so poetic that they didn't need music but once you put the two of them together, the sum of the parts would be greater than the whole, and you couldn't imagine them apart. Once he'd done this, he was still looking for a way to take it to even greater heights and he realized that putting the songs within the context of a story would give it a third dimension that wou ld make that additional emotional impact possible.
Hence, he started writing not just albums, but rock operas.
He realized then, that there was an inherent problem recording rock operas within the standard rock and roll band makeup. Rock operas by their nature need the voices to change as the characters change. Rock bands normally only have one (or if you're lucky) two great vocalists to work with, therefore limiting how far you can go. You're forced to make the music fit the band, as opposed to allowing the music to go wherever it needs to.