Delay Time Calculator
Calculates the exact delay time in milliseconds that syncs an audio effect to a given tempo and note value. Used by guitarists, producers, and sound designers to set tempo-locked echo effects.
About this calculator
A tempo-synced delay repeats audio at intervals that align precisely with the musical beat, creating rhythmic echoes instead of random slap-back. The formula is: delay time (ms) = (60000 / BPM) × noteValue. Dividing 60000 (milliseconds per minute) by the BPM gives the duration of one quarter note in milliseconds. Multiplying by the note value scales this to the desired rhythmic subdivision: use 1 for a quarter note, 0.5 for an eighth note, 0.25 for a sixteenth note, and 1.5 for a dotted quarter note. At 120 BPM, one quarter note equals 500 ms, an eighth note equals 250 ms, and a dotted quarter equals 750 ms. Setting delay units this way ensures every echo lands on a musical grid point, keeping the effect tight and rhythmically coherent rather than clashing with the track.
How to use
Say you are mixing a guitar track at 90 BPM and want a dotted eighth-note delay (note value = 0.75). Enter 90 in the Tempo field and 0.75 in the Note Value field. The calculator computes: delay time = (60000 / 90) × 0.75 = 666.67 × 0.75 = 500 ms. Set your delay pedal or DAW plugin to 500 ms and every echo will land rhythmically on the dotted eighth grid — a popular U2-style effect. For a straight quarter note at the same tempo: (60000 / 90) × 1 = 666.67 ms.
Frequently asked questions
How do I choose the right note value for a tempo-synced delay effect?
The note value determines the rhythmic feel of the repeats. A quarter note (1.0) creates a bold, on-the-beat echo. An eighth note (0.5) produces faster, busier repeats common in pop and rock. A dotted eighth note (0.75) is the iconic Edge-style delay that creates a syncopated, rolling texture. A sixteenth note (0.25) gives a tight, machine-gun stutter effect. Start with a dotted eighth or quarter note for most musical contexts, then experiment with shorter values for rhythmic special effects.
Why is delay time measured in milliseconds rather than beats?
Delay hardware and many plugins accept time in milliseconds because they were designed before tempo-sync became standard. Expressing delay in milliseconds gives you precise, tempo-independent control — useful when recording without a click track or when replicating a vintage gear setting. Converting from BPM to ms lets you dial in the exact value even on analog gear. Modern DAW plugins often offer both modes, but knowing the ms value lets you match a setting across any device regardless of its feature set.
What happens to the sound if the delay time is not synced to the song's BPM?
An unsynced delay creates echoes that fall off the rhythmic grid, producing a washed-out or cluttered sound as repeats clash with incoming notes. At slow tempos with long delay times, the effect may sound like a reverb tail rather than a discrete echo. At fast tempos with the wrong delay time, repeats can pile up and turn into a muddy smear. While intentionally unsynced delays are used for ambient and experimental textures, most mixing contexts benefit from tempo-locked timing to keep the effect musical and transparent.