This rhythmic delay technique is commonly associated with The Edge. The guitar plays 8th notes, while the wet signal from a delay unit is set to (roughly) a dotted eighth note, creating the illusion that a note is being performed every 16th note. After two notes are played, the spaces between each note played are filled with copies of the second to last note played. By doing this, you can play very sophisticated sounding arpeggiations, or play something twice as fast with half the effort.
Music Morsels are musical fragments, collected and analyzed.