Like the thread title says, I noticed over the weekend that a few sound effects get used for a TON of abilities and buffs.

For example, my favorite tank champion is Singed. My hearing has keyed in on the sound effect made by turning on his gas trail.

I noticed that when I'm in a group of champions, I hear this noise a lot and it throws me off a bit as I keep checking to make sure the gas isn't flowing and draining my mana.

As I played other champions over the course of the weekend, it seemed like a fairly good number of them share this sound effect. I'm blanking out a bit this monday morning, so the only one that immediately pops to mind is Alistair's heal ability.

I think it is also used for many other abilities and buff notification noises.

We need more sounds!

If I understand correctly which sound you're referring to, it's one of the common placeholder audio pieces.

Subtle "whoosh/hiss" sound.

Ive had the same problem. Damn Allistairs keeping one of my eyes on my mana.