Free Tool
Delay & Reverb Calculator
BPM-synced delay times, dotted and triplet values, and reverb pre-delay — all in one place.
Delay Times
Triplet Delay Times
Reverb Pre-Delay
How Delay Times Work
BPM-Synced Delays
A delay synced to your song's tempo keeps echoes rhythmically in time. A 1/4 note delay at 120 BPM is exactly 500ms — the echo lands right on the next beat.
Dotted & Triplet
Dotted values are 1.5× the normal note length — they create a bouncing, syncopated feel. Triplet values are 2/3× — they create a shuffle or swing rhythm.
Reverb Pre-Delay
Pre-delay is the gap before reverb kicks in. Short pre-delay (5–15ms) blends the dry signal into the reverb. Longer pre-delay (30–80ms) lets the transient punch through before the tail blooms.
Frequency (Hz)
The frequency column shows the modulation rate equivalent of each delay time. Useful for setting LFO speeds, tremolo rates, or sidechain compressor timing to match the groove.
Frequently Asked Questions
Which delay value should I use?
1/4 note for classic slapback. 1/8 dotted for the iconic U2/Edge delay. 1/16 for doubling and thickening. Experiment with triplet values for swing and groove.
What's a good reverb pre-delay?
For vocals, try 20–40ms to keep clarity. For drums, 5–15ms keeps them tight. For cinematic pads, 60ms+ creates separation between the source and the space.
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