The Edge uses dotted-eighth note delay to create that shimmer. A clean Vox amp with heavy delay is the core.
Signal Chain
Vox AC30→Dotted Eighth Delay→Infinite Sustain (EBow-style)→Output
AmpVox AC30
bass
5
gain
3
treble
7
presence
5
EffectDotted Eighth Delay
mix
6
time375ms
feedback
6
EffectInfinite Sustain (EBow-style)
mix
8
Notes
The delay timing is key. Use a 375ms delay with 6 repeats. Play simple sustained notes.