Dotted Eighth Note Delay

The dotted eighth note delay is arguably the most iconic delay setting in rock music history. Made famous by The Edge of U2, this technique creates a rhythmic, cascading shimmer — where the delayed note falls exactly between the beats, producing a flowing, syncopated groove. Here's everything you need to know.

What Is a Dotted Eighth Note?

In music theory, a "dotted" note is 1.5× the duration of the original note. So while an eighth note at 120 BPM lasts 250ms, a dotted eighth note lasts 375ms — exactly halfway between an eighth (250ms) and a quarter note (500ms).

This 3:4 ratio creates a polyrhythmic effect when the delay repeats against your playing. The delayed notes fall in the gaps — not on top of what you're playing — creating the illusion that you're playing twice as many notes, in perfect rhythmic sync.

The Edge's Sound: How It Works

The Edge's signature sound relies on two things: a dotted eighth delay and a rhythmic, staccato playing style. He plays short, precise eighth-note arpeggios while the delay fills in the gaps with dotted-eighth repeats. The result is a constantly-moving, interlocking pattern.

The key insight: The Edge doesn't just let the delay wash over everything. He plays to the delay — picking patterns that complement and interact with the delayed repeats. The delay becomes a second guitarist, locked in perfect time.

Famous examples: "Where the Streets Have No Name" (dotted 8th at ~126 BPM = ~357ms), "Pride (In the Name of Love)", and "Bad" all showcase this technique.

Dotted Eighth Delay Times for Common BPMs

Use this reference table to find the dotted eighth delay time for any common BPM. Click any BPM for the full delay time breakdown.

How to Set It Up

Beyond The Edge: Other Uses

While The Edge made it famous, the dotted-eighth delay is used across genres:

Post-rock — Bands like Explosions in the Sky and This Will Destroy You use dotted-eighth delays with heavy reverb to create cathedral-like soundscapes.

Worship music — The dotted-eighth is a staple of modern worship guitar, creating that "angelic" cascading effect over pads and swells.

Synthwave and electronic — Synced dotted-eighth delays on synth arpeggios create driving, hypnotic patterns that fill the stereo field.

Ambient — With high feedback and heavy filtering, dotted-eighth delays dissolve into evolving textures.

Dotted Eighth vs Quarter Note Delay

The quarter note delay (60,000 ÷ BPM) puts the repeat on the beat. The dotted eighth puts it between the beats. The quarter note reinforces the rhythm; the dotted eighth creates new rhythmic interest. Many players use both — a quarter note delay for foundational echo and a dotted eighth for the shimmer on top.