reverse delay
Quote by strat0blaster
This is terrible advice. Even worse than the useless dry, sarcastic comment I made.

Quote by Cathbard
I'm too old for the Jim Morrison look now. When I was gigging I had a fine arse.
you probably have to fade in the notes. You can do this by strumming the note while the volume of your guitar is off, and then slowly raising the volume of your guitar. I recommend doing this with the volume knobs on the body of the guitar.
Feedback loops FTW. Fun thing with that is that you can make weird noise with plain ordinary cheap pedals (DOD Death Metal is a favorite among noisicians).
Quote by stonyman65
reverse delay

Yep, reverse delay and the 'volume swell' technique, as mentioned by Ston3Cold. He probably has some healthy reverb on as well.

You can do volume swells with a delay pedal or reverb pedal, or both. I've found that having a nice long reverb trail really helps to extend the notes/chords for some nice atmosphere.
Atmospheric dark metal w/ black and death metal influences:
(My Soundcloud page):

Pestilential Flood