To use a delay pedal to improve your songwriting, set the delay time to a dotted eighth note — 60000 ÷ BPM × 0.75 milliseconds — and then deliberately play fewer notes than the part needs, so the pedal supplies the 16th notes your hands aren’t playing. Delay used this way is a rhythm generator, not an ambience effect. It writes the pattern; you play the sparse version and let the repeats fill the gaps.
What does a delay pedal actually do for songwriting?
- One formula does the whole job. A quarter note lasts
60000 ÷ BPMmilliseconds. At 120 BPM that’s 500 ms, so a dotted eighth is 375 ms and an eighth is 250 ms. Set that number and the pedal is in time with you instead of against you. - The dotted eighth creates a 3-against-4 polyrhythm you couldn’t play. Each repeat arrives one 16th note earlier in the beat than the last, so the repeats only land back on a downbeat every 3 beats — and only realign with bar one every 3 bars.
- Play half as many notes. The Edge’s Where the Streets Have No Name is a Strat on the bridge pickup into a clean amp; the famous 16th-note pulse comes from a dotted-eighth delay filling the gaps, not from busy picking.
- Feedback is a songwriting control, not a volume. Three or four repeats is where the rhythm becomes audible as rhythm. Past that you get texture, which hides weak parts rather than exposing them.
- Tempo and delay time are one decision. As The Edge put it: “If I’m not playing the right tempo, you get a totally different result. The two work off each other.”
| Best for | Players who own a delay pedal or plugin, can play to a click, but have used one setting since they bought it and never matched the time to a tempo. |
| Skip if | You already tap-tempo into subdivisions on purpose, or you write polyrhythmic parts without the pedal’s help. |
| Time cost | 10 minutes a day. Setting the time correctly is a day 1 change and audible instantly. Playing sparsely enough to let the pedal work takes about 7 days — that’s the hard part, and it’s a habit, not a skill. Writing with it takes about 21. |
How do I set my delay time to match my tempo?
Divide 60,000 by your tempo to get the length of one beat in milliseconds, then multiply by the subdivision you want. At 120 BPM one beat is 500 ms; multiply by 0.75 for a dotted eighth (375 ms), by 0.5 for an eighth (250 ms), by 0.25 for a 16th (125 ms), or by 1/3 for an eighth triplet (167 ms). If your pedal has a millisecond display, type the number in. If it only has tap tempo, tap quarter notes for a quarter-note delay — then use the subdivision switch if it has one.
DRILL 1 — COMPUTE AND SET
Tempo: [120] BPM, metronome ON and audible
Math: one beat = 60000 / [120] = [500] ms
dotted eighth = [500] x 0.75 = [375] ms
Set: [YOUR PEDAL] delay time to [375] ms
Feedback: 3-4 audible repeats. Mix: ~40%.
Play: one single note — [D] on the high E string, fret [10] —
on beat 1 only. Nothing else. Let the repeats run.
Reps: 8 bars. Then repeat at [90] BPM (dotted eighth = 500 ms).
DONE WHEN: you can predict where the first repeat will land before
you hear it — a 16th note before beat 2.
Time: 3 minutes.
What is a dotted eighth delay and why does it sound like that?
A dotted eighth delay repeats your note three-quarters of a beat later, which means each successive repeat arrives one 16th note earlier in the beat than the one before it. Play a note on beat 1 and the repeats land at 0.75, 1.5, 2.25 and 3.0 beats — positions 3/4, 1/2, 1/4 and 0 within their beats. The fourth repeat is the first to land exactly on a beat. That backwards drift through the beat is the “chukka” pulse people recognise, and it’s arithmetic, not magic.
Here’s the useful consequence: the dotted eighth completes its cycle against the beat every 3 beats, but against a 4/4 bar it doesn’t realign until repeat 16, which is 12 beats — three full bars. That’s why a dotted-eighth part sounds like it’s endlessly shifting yet never lost. You’re hearing a 3-against-4 relationship that resolves on a three-bar cycle. That’s the whole trick, and it’s why the effect writes parts your hands would never invent.
If you want every subdivision from 60 to 160 BPM already worked out — including the awkward tempos where the maths gives you 409 ms and you’d rather not do it in your head — The Delay Time Chart is linked below.
Why does my delay pedal just sound like mush?
Because the delay time doesn’t divide into your tempo, so every repeat lands between the beats at random, and because you’re playing too many notes for the repeats to be heard as separate events. Two fixes in order: set the time by the formula rather than by ear-twiddling, then halve your note count. A delay repeating notes you’re already playing adds nothing but level. A delay repeating into the gaps you deliberately left adds a second guitar part.
Where should a delay pedal go in my signal chain?
After drive and modulation, before reverb: guitar → tuner → compressor → drive → modulation → delay → reverb → amp. Delay placed there repeats your finished tone rather than repeating a clean signal that then gets distorted, which keeps the repeats clean and articulate — important when the repeats are carrying rhythm. If your amp has an effects loop, put delay in the loop. Putting delay in front of a heavily driven amp smears the repeats together, which is the opposite of what rhythmic delay needs.
Am I using my delay pedal wrong?
| Element | How most people use delay | What actually works for writing |
|---|---|---|
| Setting the time | Turn the knob until it sounds nice | Compute 60000 ÷ BPM × subdivision and set that number |
| What it’s for | Making a part sound bigger | Generating a rhythm you then write around |
| Note count | Play the full part, add delay on top | Play half the part and let repeats supply the rest |
| Feedback knob | High, for atmosphere | 3–4 repeats, where the pattern is still countable |
| Order of decisions | Write the part, then pick a delay setting | Set tempo and delay first; write into what the pedal gives you |
| Judging it | Solo, no click | Against a click, then with the delay bypassed to check the part survives |
Can you show me a real worked example, start to finish?
Yes. Input: Where the Streets Have No Name by U2 — the reference recording for this technique. BOSS’s breakdown describes it as a D major progression with “a relentless 16th-note strumming pattern accentuated by the clear-sounding digital delay set to a dotted eighth,” played on a Strat bridge pickup into a clean amp. The chords are D, G, Bm and A.
Step 1 — get the tempo, and notice the problem. Published figures for this song scatter between roughly 123 and 128 BPM depending on version and who measured. That range matters: at 123 BPM a dotted eighth is 366 ms, at 128 it’s 352 ms — a 14 ms difference that is audible as drift over a few bars. This is exactly why you tap the tempo to the track rather than trusting a number you read online.
Step 2 — do the maths at your chosen tempo. Taking the commonly cited 126 BPM: one beat is 60000 ÷ 126 = 476 ms, so the dotted eighth is 476 × 0.75 = 357 ms. Set that, feedback for 3–4 repeats, mix around 45%.
STEP 3 — WHAT TO PLAY. Key of [D major], [126] BPM, delay [357] ms.
Triads on the top three strings, two bars each:
D G Bm A
e|------5------------10-----------10-----------9-------|
B|------7------------12-----------12-----------10------|
G|------7------------12-----------11-----------9-------|
D-F#-A G-B-D B-D-F# A-C#-E
STEP 4 — HOW to play it. Do NOT strum 16ths.
Pick ONE note of each triad on beat 1 and one on beat 3. That is
two notes per bar. The delay fills the other fourteen 16ths.
What your hand does: x . . . x . . . (2 notes per bar)
What the room hears: x . . x . . x . x . . x . . x .
^ repeats arriving a 16th earlier each time
DONE WHEN: you bypass the delay, hear how sparse your part is,
and it still makes harmonic sense on its own.
Output: two picked notes per bar producing a continuous 16th-note pulse, with the harmony moving I – IV – vi – V in D major. You are playing roughly one-eighth of the notes a listener hears. That ratio — not the pedal’s price — is what makes delay a songwriting tool.
What’s the advanced version of the dotted-eighth trick?
Work the formula backwards to reverse-engineer any record. For a dotted-eighth delay, BPM = 45000 ÷ delay time in ms. Hear a delay you like, match it by ear on your own pedal, read the milliseconds off the display, and that formula tells you the song’s tempo. A 400 ms dotted eighth means 112.5 BPM; 300 ms means 150 BPM. This is the fastest way to steal a rhythmic idea correctly, and it works in reverse when a producer gives you a tempo and no other information.
The deeper move is choosing your subdivision by the polyrhythm you want, because each one has a different cycle length. A dotted eighth gives 3-against-4: repeats land on a beat every 4 repeats and realign with the bar after 16 repeats, or three bars. An eighth triplet gives 2-against-3 and resolves far faster — every 3 repeats lands back on the beat, so it feels busy but stable. A straight 16th never conflicts at all, which is why it thickens without generating any new rhythm. Pick the dotted eighth for tension across bars, the triplet for motion inside a bar, the 16th for size alone. Most articles hand you the dotted-eighth setting; almost none tell you it takes three bars to come home — precisely what you need when deciding how long a section should be.
DRILL 2 — THE PRECESSION TEST
Tempo: [120] BPM. Delay = dotted eighth = [375] ms, feedback 4 repeats.
Play: ONE note on beat 1 of bar 1. Then silence for 3 full bars.
Count: out loud, in 16ths: 1-e-and-a 2-e-and-a 3-e-and-a 4-e-and-a
Task: say which 16th each repeat lands on. Answers:
repeat 1 -> the "a" of beat 1 (3/4 of a beat in)
repeat 2 -> the "and" of beat 2 (1/2)
repeat 3 -> the "e" of beat 3 (1/4)
repeat 4 -> exactly on beat 4 (0)
Reps: 10 passes. Then switch the pedal to a triplet setting
([167] ms at [120] BPM) and notice it resolves every 3 repeats.
DONE WHEN: you can call each repeat's landing spot before it sounds.
Time: 4 minutes.
DRILL 3 — SUBTRACT UNTIL IT BREAKS
Tempo: [120] BPM. Delay dotted eighth [375] ms, mix ~45%.
Play: your own riff or [D-G-Bm-A] triads, full 16th strumming.
Then: play it again with HALF the notes. Then half again.
Then half again — down to two notes per bar.
Reps: 4 passes, removing notes each time. Record each on your phone.
Listen: play the four recordings back. Most players find pass 3
is the one that sounds like a record.
DONE WHEN: you can identify which pass is best WITHOUT looking at
which one you thought was best while playing.
Time: 3 minutes.
What’s a 30-day plan for writing with a delay pedal?
30-DAY PLAN — 10 min/day, guitar in hand, nothing written down.
Pedal: [YOUR DELAY]. Tempo: [120] BPM. Key: [D major].
WEEK 1 — THE NUMBER
Days 1-3 : Drill 1. Compute the dotted eighth, set it, one note per bar.
Do the maths OUT LOUD before you touch the pedal.
Days 4-5 : Same at [90] and [140] BPM. Compute each time; no guessing.
Days 6-7 : Set the pedal WRONG on purpose (off by 60 ms) and listen to
the drift. Then fix it. Learn what wrong sounds like.
Week 1 win : you never twiddle the time knob again.
WEEK 2 — THE POLYRHYTHM
Days 8-11 : Drill 2, the precession test. Call each repeat's landing spot.
Days 12-14: Switch between dotted eighth and triplet mid-bar. Notice the
dotted eighth pulls forward, the triplet sits still.
Week 2 win : you can hear WHICH subdivision a record is using.
WEEK 3 — SUBTRACTION
Days 15-18: Drill 3. Halve your note count four times, record each pass.
Days 19-21: Take a part you already wrote. Remove notes until the delay
is doing more work than your right hand.
Week 3 win : playing less stops feeling like cheating.
WEEK 4 — WRITE ONE
Days 22-25: Set tempo and delay FIRST, before you know the chords.
Write into what the pedal hands you. One idea per day.
Days 26-28: Choose section lengths deliberately: the dotted eighth
realigns every 3 bars, so try a 6-bar section, not 8.
Days 29-30: Record 60 seconds. Then bypass the delay and play it dry.
If the dry part is boring, the song is fine. If the dry
part is incoherent, you leaned on the pedal too hard.
Week 4 win : one section written BY the pedal, not decorated with it.
RULE: skip a day, repeat the day. Week 3 is where people quit, because
subtraction feels like losing. It is the entire method.
Free: The Delay Time Chart (PDF)
Every subdivision — quarter, dotted eighth, eighth, eighth triplet, 16th — computed for every tempo from 60 to 160 BPM in 2 BPM steps, printed as one page you can tape to your pedalboard. Includes the reverse column (delay time → BPM) for reverse-engineering records, plus the ten drills in the same copy-paste format as the three above.
Why it beats doing it manually: the maths is easy, but doing it mid-idea kills the idea. Awkward tempos give you 409 ms and 643 ms, and by the time you’ve worked one out you’ve forgotten the riff. Every value was generated in code, not transcribed.
Upgrade: the AI Riff Generator
Paste this into Claude, ChatGPT or Gemini. It builds a sparse part designed around your pedal’s actual subdivision, which is the opposite of what you get if you ask for “a riff.” Checked July 2026 against Claude Opus 5, ChatGPT (GPT-5 class) and Gemini 2.5 Pro.
You are my songwriting partner. My delay is set to [SUBDIVISION]
at [BPM] BPM. I play [guitar, standard tuning], level
[advanced beginner]. Key: [KEY].
Do this in order:
1. Compute my delay time: 60000/[BPM] x the subdivision multiplier.
Show the arithmetic. State the multiplier you used.
2. Tell me exactly where repeats 1-4 land, as 16th-note positions
("the a of beat 1"), and after how many repeats the pattern
realigns with bar one.
3. Give me a part with NO MORE THAN 2 NOTES PER BAR, as fret
numbers on strings 1-3 above fret 7. Say which beats to pick on.
4. Write out what a listener hears once the repeats fill in.
5. Recommend a section length in bars that matches when my
subdivision realigns.
Rules: never more than 2 notes per bar. No strumming patterns.
Do not suggest I buy anything. If my subdivision generates no
polyrhythm (straight 16ths), say so and tell me to change it.
End by asking what the repeats actually sounded like.
The 2-notes-per-bar constraint is the point — without it, every model writes a busy part the delay then buries.
Frequently asked questions
What delay time should I use for a dotted eighth?
Multiply one beat by 0.75. One beat is 60,000 ÷ BPM milliseconds, so at 120 BPM you get 500 × 0.75 = 375 ms; at 100 BPM, 450 ms; at 140 BPM, 321 ms. If your pedal has a dotted-eighth subdivision setting, just tap quarter notes and let it do the multiplication. Getting within about 5 ms is close enough — beyond roughly 15 ms off you’ll hear the repeats drift.
How do I calculate delay time from BPM?
Delay time in milliseconds = 60,000 ÷ BPM, multiplied by your note value. Use 1 for a quarter note, 0.75 for a dotted eighth, 0.5 for an eighth, 1/3 for an eighth triplet and 0.25 for a 16th. At 90 BPM: a quarter is 667 ms, a dotted eighth 500 ms, an eighth 333 ms, a 16th 167 ms. The same arithmetic sets reverb pre-delay and tempo-synced tremolo.
Why does the dotted eighth delay sound so good?
Because it creates a 3-against-4 polyrhythm rather than doubling what you play. Each repeat lands one 16th earlier in the beat than the last, so the pattern drifts backwards through the beat, lands on a downbeat every fourth repeat, and only realigns with the bar after 16 repeats — three bars. That slow resolution is what your ear hears as forward motion, and it’s why the effect feels composed rather than added.
Do I need a tap tempo delay pedal?
No, but you need a way to hit a specific number. A pedal with a millisecond readout is ideal because you can type in the value you calculated. A pedal with tap tempo and a subdivision switch is just as good and faster live. A basic pedal with only a time knob still works — set it by matching a metronome click’s repeats by ear, then mark the knob position with tape for the tempos you write in most.
Should delay go before or after reverb?
Before reverb, in almost every case: drive → modulation → delay → reverb. That way the reverb treats your delay repeats as part of the room, which sounds natural. Reversing it makes the delay repeat the entire reverb wash, which is a thicker and much harder effect to control. For rhythmic delay specifically, keep reverb low or off while writing — reverb blurs exactly the note edges you’re trying to hear.
How many repeats should I set on my delay pedal?
Three or four for songwriting. That’s enough for the polyrhythm to become audible as a pattern you could count, and few enough that your actual playing stays in front. Higher feedback turns the effect into texture, which is a legitimate sound but hides weak parts instead of exposing them. If you can’t tell whether your dry part is any good, your feedback is too high.
Can I use these delay settings on vocals or keys instead of guitar?
Yes — the arithmetic is source-independent, and any DAW delay plugin will accept the millisecond value or sync to your project tempo directly. The technique transfers with one caveat: sparse sources benefit most. A sustained pad gives the repeats nothing to bite on, whereas a short plucked or staccato sound produces the same rhythmic filling you get from a guitar. Fret numbers here are guitar-specific; the maths isn’t.
About the author
Justin Ray performs as Enviot Von Beardio
Last updated: 29 July 2026
Changelog: Recomputed every millisecond value in code rather than transcribing a chart; added the reverse formula (BPM = 45000 ÷ ms) and Drill 2’s precession table; added the subdivision cycle-length comparison to the level-up; documented the 123–128 BPM disagreement on the reference track instead of picking one figure silently.
Review cadence: every 14 days. Google’s helpful-content guidance warns against “changing the date of pages to make them seem fresh when the content has not substantially changed,” so this date moves only for a new drill, a corrected claim, a replaced tool or a new example. Typos don’t count.
Version notes
- All millisecond values: generated in code from 60000/BPM in July 2026 and round-tripped through the reverse formula. Rounded to the nearest millisecond.
- Polyrhythm claims: repeat positions computed with exact fractions, not decimals, to confirm the 4-repeat beat cycle and 16-repeat (three-bar) alignment.
- Tuning: fret numbers assume standard E A D G B E at A = 440 Hz; triads verified by MIDI pitch conversion.
- Reference track tempo: published figures for “Where the Streets Have No Name” vary roughly 123–128 BPM by version and source; 126 used for the worked example and the variance stated rather than hidden.
- BOSS article: published and last modified 12 Apr 2023; quotations checked against the live page July 2026.
- AI Riff Generator prompt: tested July 2026 against Claude Opus 5, ChatGPT (GPT-5 class), Gemini 2.5 Pro.
Sources and free tools
- Dotted-eighth delay on Where the Streets Have No Name, the D major progression, the 16th-note strumming pattern, the Strat-into-clean-amp signal chain, and The Edge’s quote on tempo: BOSS, “Patch Work: Where the Streets Have No Name by U2”.
- Signal-chain ordering: BOSS, The Ultimate Guide to Guitar Effects Pedal Order and Signal Chain.
- Further Edge technique breakdown: MusicRadar, “5 ways to play like The Edge”.
- Chord and melody analysis of the reference track: Hooktheory TheoryTab. Song background: Wikipedia.
- Tempo-to-delay-time conversion, to check the arithmetic independently: sengpielaudio BPM/delay calculator and SoundGrail delay time calculator.
- Date-stamping guidance: Google Search Central, Creating Helpful Content.
- Free, no-signup practice tools: musictheory.net exercises, teoria.com, tonedear.com ear training, JustinGuitar.