well its all about bpm as is most if not all delay based songs..So if the song is at 110bpm you would use 409ms if the bpm is at 109 it would be 412ms. So I suggest downloading the free program called Mixmeister and load any mp3 into it and it spits out the bpm. With that just use any delay calculator to get delay time. Only questions are is it 1/4 note or dotted 8th as those are the most popular Edge delays.. With the Fly intro what I do is setup my base tone then I add another delay on top of it with the same delay time but with almost infinite repeats not with a low output but with the same output. I then can just turn it off and the reg delay takes over with a stomp..Make sense
Mick