The Shimmer effect has really been elusive in the modern church U2 inspired music. Along with two tap tempo delays, the shimmer effect is really essential to the Edge’s sound.
Here is the basic idea: split the guitar signal at the beginning of your chain after your compressor with a volume pedal, with the main signal passing unhindered through the tuner send (a dry send) so it can continue on to the rest of the pedal board and amp.The output of the volume pedal goes to through a reverb tank/pedal, such as the Line6 Verbzilla and on to a second amp. Use the volume pedal to adjust the amount of shimmer with the dry signal.
here is a great example:
For the Sunday morning rack I split the signal after my Demeter Compressor with a Barber Launch Pad and send one signal to a Nobel’s MC-V Midi Volume Controlled Amp and on to an Alesis miniverb. This allows me to control the shimmer effect via an expression pedal and the Skrydstrup SC1.
For Crash, Danny Ortega’s plan is to use a Visual Sound Volume pedal and a Verbzilla. Also, added in the mix might be a Radial EFX looper. Because the Visual Sound volume is stereo, I think it is possible to use one loop and send as a shimmer, then a second loop if he wanted to use the verb tank on the back end of the chain. But, we’re still working that one out.