To give you a useful answer requires a couple of different sets of questions.
First and foremost, since you're a new guy: how much have you used AE; how do you count your experience with it -- in years? Months? Weeks? Days?
Now the second set: which effect are you talking about -- the glowing cello string? The colored light on the player's face? The volumetric shapes emanating from the instrument? Something else? Each effect was done using a different technique.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA