A music delay repeats the sound at an interval that fits the rhythm of the track. To set up a music delay, you therefore link its repeat time to the tempo, then adjust it by ear to suit the groove you’re playing.
In dub, this setting makes all the difference. An echo that’s just a little too short can disrupt the bass. If it’s too long, it arrives after the drop and leaves the mix sounding hollow. When set correctly, it extends a vocal, a snare drum or a keyboard chord without stealing the spotlight from the riddim.
The right setting doesn’t just depend on a number displayed in milliseconds. It depends on the track, the drumming, the bass’s role and how you adjust the send level. The tempo provides a starting point. Your ear does the rest.
Why timing a musical delay changes your mix
Delay creates repetition. If this repetition falls between two beats, it can add movement. If it lands in the wrong place, it muddles the beat. On a slow, airy riddim, the discrepancy is immediately noticeable.
This is even more true when you’re working with a round bassline, a heavy kick and isolator filters. The low end needs space. A delay left too open across the entire spectrum piles up repeats in the lower end of the mix. You then lose the impact of the first bass hit.
Setting the timing gives you a stable foundation. You can then decide to break it up. Many selectas like to shift the delay slightly to create tension, especially before a repeat or during a more stripped-back section. The difference is simple: you start with the right setting, rather than fumbling around at random.
Tempo: the starting point for delay
BPM indicates the number of beats per minute. From there, you can calculate the duration of one beat in milliseconds. The formula is simple: 60,000 divided by the BPM.
At 120 BPM, one beat lasts 500 ms. At 140 BPM, it lasts around 429 ms. This duration corresponds to a quarter note. For an eighth note, you halve the figure. For a half note, you double it.
In reggae and dub, you don’t need to get a calculator out every time you select a track. It’s enough to remember a few reference points. Many tracks operate within a range where a quarter note falls between 400 and 550 ms. Set your delay within this range, then listen to how the repeat responds to the snare, the skank or the vocals.
Table: time reference points for setting a delay
| Tempo | Quarter note, 1/4 | Eighth note, 1/8 | Dotted quarter note | Half note, 1/2 |
|---|---|---|---|---|
| 70 BPM | 857 ms | 429 ms | 1286 ms | 1714 ms |
| 80 BPM | 750 ms | 375 ms | 1125 ms | 1500 ms |
| 90 BPM | 667 ms | 333 ms | 1000 ms | 1333 ms |
| 100 BPM | 600 ms | 300 ms | 900 ms | 1200 ms |
| 120 BPM | 500 ms | 250 ms | 750 ms | 1000 ms |
| 140 BPM | 429 ms | 214 ms | 643 ms | 857 ms |
The dotted quarter note deserves your attention. It returns after one and a half beats. On certain steppers or faster tracks, it creates a less rigid bounce than a simple quarter note. It can follow the groove very well without mechanically repeating every beat.
But the calculation has its limits. A track might be played with a slight delay, feature a human drummer, or have an intro without a clear reference point. In such cases, the theoretical value only brings you close to the right range. You then fine-tune it by ear.
How to set a musical delay by ear
Start with very little feedback. A single clear repetition is better than a muddled trail. Send a snare, a short vocal or a keyboard chop into the delay, then find the moment when the echo seems to respond naturally to the phrase.
Avoid starting with a bass line. It contains too much low-end energy and quickly masks the echo’s actual placement. A snare drum, a rimshot or a single word will give you a better indication of whether the echo lands on a beat, between beats or too close to the source.
As you get closer to the right setting, gently increase the feedback. Each repetition reveals timing errors. If the pattern starts to lag behind the track, shorten the time slightly. If it pushes the rhythm forward and disrupts the skank, lengthen it slightly.
The most reliable test is still silence. Cut the signal to the delay and let its tail run for a bar or two. If it extends the riddim, your setting is spot on. If it seems to tell a different story, you’ll need to adjust the tempo or reduce the feedback.
Quarter note, eighth note or dotted note?
The quarter note is the simplest choice. It produces a steady, clear echo that’s easy to control. It works well with vocals, a snare drum or an occasional chord.
The eighth note brings more movement. It quickly fills the space and requires a more careful hand with the feedback. Use it when the arrangement remains light, or when you want to add density to a passage without adding a new track.
Dotted notes create a livelier offset. They don’t always land where the listener expects them to. This is often a good option for a drop, a short siren or a vocal phrase, provided you keep the bass frequencies out of the monitor.
You can also opt for a deliberately loose setting. An old tape echo wasn’t always calibrated to the millimetre, and this instability is part of its character. The risk is losing the beat. Save this approach for a short passage, or when the track leaves plenty of breathing space.
Timing alone isn’t enough: adjust the feedback and the filter
The tempo determines the timing of the repeats. Feedback decides how many times they come back. With low feedback, you get an accent. With high feedback, you build up a texture that can quickly take over the whole track.
When recording at home, start low. Two or three repeats are enough to understand how the setting works. If you turn the feedback right up from the start, you won’t know whether the problem lies with the tempo, the send level or the build-up of the echoes.
The filter is your ally. Cut some of the low end from the return if the echo is affecting the bass or the kick. You can also tone down the treble if the repeats become harsh or aggressive. A filtered delay remains present without overpowering the track.
Here’s a simple signal chain to bear in mind: source, effects send, delay, filter, return to the mix. If the return gets too loud, even the most precise timing won’t save you. Turn it down before you adjust the tempo.
On a compact unit like the KLEMENTZ Dub Mixer, having the mixer, filters, siren and delay all to hand helps you hear how they interact. You can adjust the return on the fly, without having to switch your attention between several units.
Mistakes that lead to a muddled delay
The first mistake is trying to synchronise every track perfectly. Some riddims benefit from a little leeway. First, look for a musical relationship between the loop and the drums, not a flawless tempo.
The second is to let the delay affect everything. In dub, the effect becomes stronger when you choose to apply it. A single syllable, a snare, a chord or a siren is enough. If every element goes through it, the track loses its character.
The third is to forget about changing records. A setting that works at 70 BPM won’t suit a track at 90 BPM. Before a transition, turn down the feedback or cut the monitor. This prevents an echo tail from the first track from falling out of time with the next one.
Finally, be careful with the volume. A delay that’s too loud often seems more impressive for a few seconds. Over an entire set, it tires the listener and masks the details of the DJ’s mix. Keep the delay slightly behind the source. The echo should support the performance, not replace it.
FAQ on musical delay
Do you need to know the BPM to set up a delay?
No. You can set it entirely by ear. Knowing the BPM speeds up the initial setup, especially if you’re playing very different tracks. It doesn’t replace listening to the actual groove.
What delay time should you choose for vocals?
Start with a quarter note. It lets the phrase breathe and remains easy to follow. Move up to an eighth note if you want a tighter effect, then filter the return so it doesn’t fill the entire midrange.
Why is my delay eating up the bass?
The return is probably containing too much low end, too much feedback, or both. Cut the low end with the filter and turn down the feedback. Also send less bass into the effect.
Can you deliberately desynchronise a delay?
Yes, and it’s actually part of the dub sound. Shift the timing slightly to create a sense of anticipation or a floating effect. Do this on a short phrase, then return to a stable setting before the mix becomes muddled.
Pick a single track that you know by heart tonight. Find its quarter note, try its eighth note, then let an echo tail fade out on its own. It’s through this repeated listening that your delay becomes an instrument.
