Are the members of Trans Siberian Orchestra actually playing live on stage or is their music pre-recorded?

I am a studio musician - I saw TSO this past Dec. at Nassau Colliseum in LI NY> I was furtunate to have seating directly under the stage. I could have easily jumped on stage, that's how close I was. I was so close that when one of the guitar players cam to my side I could hear the picking of his guitar strings. I found this unusual since I have played live many, many times and I know from the way he was picking and the sound that was coming out of the PA could not possibly be what he was playing. Then I began to observe closer - I checked out the oriental violinist - I also play the violin....once I tiook a closer look and watched him bow against the strings while he just took a leaping jump from one part of the stage to my side (I was only maybe 4 ft away from him) his bow bounced up and down the strings - yet the audio from the violin was a contstant straight smooth no flutter . How can this be? I then started to serioulsy check out all of them on stage - The drummer was definitely playing, the bass player - not sure - the audio of his bass was very rounded and compressed yet he plays with a pick which (I also play bass) would resonate some high end clickingon the strings - his bass sound from the pa sounded more like a Taurus pedal than a bass - no way the bass played on stage was what I was earing out of the PA. The only guitar that may have been live was the lead - I know this because he made a mistakeon one ofthe songs and it was clear - ANother thing that baffled me - was - there were no guitar or bass amps anywhere in sight. I an see uner the stage as well - Nothing !?? It may well be that they are going DI (direct input tothe board) but even so - the feedback and audio would never translate as what I heard in PA if they were playing direct. I have to say that TSO does NOT entirely play all their instruments live - They are all playing to a click as well as an audio track. The vocalists (some) do sing live - some of the girls that do the magic Flute Mozart leads - do NOT - Running up and down the aisles and not hearing any pop in the mics or any breath - tell me that they are lip syncing - The keyboards - I could not tell - did not have a view of their hands -

Even with what I am revealing here - I still give them credit - because their compositions are still very original and unique - Bottom line - I will go to see them again - just because I like their mix of classical and metal - and I will not lookso close next time -