Orchid - Apostle in Triumph

it REALLY IS a guitar effect, no doubt about it!

it's the same sound you hear in black rose immortal, and maybe somewhere else in orchid.

anyway, that's a guitar that sounds that way. NO VIOLINS!
 
Have you listened to MetallicA's My Friend Of Misery? The slow part just before the solo... It's called "violing" if I'm correct.. and it is a guitar effect...
 
It's just a guitar effect that gives it like no attack. I've seen Petrucci use it a bunch live.