Right Sven I try to do my best to give you a little insight.
The guy who posted the question of replicating the way Davids vocal come across on Wonderful World wrongly assumed that it was achieved through a method called "double tracking". This is when the vocal is recorded twice and in this case the guy who asked the question panned one vocal to the left and one to the right hoping to get a more expansive sound on his vocals.
The SOS contributor rebukes this idea and says that it's just one vocal on this song with no double tracking. He then goes into the type of effects that he believes are used on the vocals. It's better to record most if not all instruments (including voice) dry and then add the effects onto them later.
The track is recorded in stereo so there are two channels. They have had a delay reverb put on them. Between 5 milliseconds and 20 milliseconds. Then one channel is very fractionally pitched shifted up and the other down by the same amount.The two channels then sit on the edges of the stereo mix. Unlike the method of just panning which the guy had unsuccessfully tried with.
Then there is another reverb added, but so slightly that it's very hard to detect.
If your are interested I have put in a link to a Sound on Sound article. It hopefully will give you a better idea of how the process evolves and some pointers to improve a recording.http://www.soundonsound.com/sos/jul99/a ... 20tips.htm