Sorry, this is all I had time for.
http://www.mattdean.com/chamberstringtripled.mp3Now, it's not just transposed and pitchwheeled back into unison. You have to also adjust the tracks so the timing is slightly off - a delay of 3,5 or 8 (plus or minus) in my Logic's track paramaters. Also, the pitch setting in my Vi interface is set to pitch up (or down) 192, or 195, or 187 instead an even 200 cents, depending on your likes. That way it isn't exactly in tune, which it wouldn't be if it were actually adding another 6 violinists.
You get the idea. It helps smooth it out. Hope this helps.
Cheers, back to work[:)]