How to set delay and reverb so they work together, not against each other

Three sessions in the same week recently where I had to stop mid-take and ask the engineer to pull the reverb down. Not because there was too much of it, exactly, but because it was eating the delay. Two beautiful effects, both doing their job, both fighting for the same sonic real estate. The result was wash. Expensive, well-intentioned wash.

Running delay and reverb together is one of the more satisfying things you can do with a clean tone. It's also one of the easiest ways to accidentally render your playing inaudible. The good news is that once you understand what each effect is actually doing to the signal in time, the solution becomes fairly obvious.

What each effect is doing (and why they collide)

Delay is a copy of your signal, displaced in time. One repeat, twelve repeats, it's still essentially a rhythmic echo of what you played. Reverb, on the other hand, is the simulation of a space — it fills the gaps between notes with dense, overlapping reflections that decay more or less slowly depending on the setting.

The problem is that reverb is not particularly selective. Apply it after delay and it will happily smear every repeat with its own decay tail. Your first repeat gets reverbed. Your second repeat gets reverbed on top of the reverb from the first. By repeat four you're swimming. That's why the order of these two effects matters just as much as the settings on each one.

The conventional signal chain places delay before reverb. Dry signal goes into the delay, the delay outputs its repeats, and reverb is applied across all of it. This is the most natural-sounding arrangement — it places you (the guitar) in the reverberant space, rather than sending echoes bouncing around an already-reverberant room. I'd argue it's the right default for the vast majority of clean and jazz applications, and I'll hold that position even when people tell me to experiment with the reverse. You can, and sometimes it's interesting, but it's rarely cleaner.

Setting delay for a clean, musical repeat

Before you even reach for the reverb knob, get your delay sounding right on its own. For most clean playing — jazz comping, fingerstyle, ambient pads — the repeat level (sometimes labelled "mix" or "effect level") should sit noticeably below the dry signal. If you can't clearly distinguish the dry note from the first repeat, it's too loud.

Feedback, or the number of repeats, is worth being conservative with. One to three repeats gives you motion without accumulation. More than that and you need a long decay time to let them breathe, which pulls you back toward the wash problem.

Tempo-syncing your delay to the song is useful in a band context, but for solo or duo playing I find I prefer setting it by ear. A delay time somewhere between 200–400ms tends to sit under a melody without cluttering it. Shorter times read as slapback (useful, different application). Longer times start to ask for a lot of space in the arrangement. If you want specific pedal comparisons at different time ranges, our best delay pedals guide covers how different units handle the extremes.

Setting reverb to complement the delay, not compete with it

Once delay is dialled in, add reverb back in with a very light hand. The reverb's job here is to give the whole signal — dry note and repeats together — a sense of physical space. It is not the star.

Two settings do most of the damage when reverb and delay conflict: decay time and mix level. Decay time is the more important of the two. A long reverb tail on top of multiple delay repeats creates that wash effect because the tails are stacking faster than they can decay. In a jazz or clean-tone context, a short to medium decay — think small room or chamber rather than cathedral — is usually enough to add air without blur. Save the long hall setting for single-note lines with lots of space around them.

Mix level on the reverb can often stay lower than you'd expect. Around 20–30% wet gives a sense of ambience without the reverb audibly colouring every repeat. The Boss RV-6 (check price) and the TC Electronic Hall of Fame 2 (check price) both have mix controls that are responsive enough in the lower range to dial this in precisely — some cheaper units jump too fast in the first quarter of the knob's travel, which makes subtle settings frustrating.

The pre-delay trick (and why it helps)

Most quality reverb pedals include a pre-delay parameter — a short gap between the dry signal and the onset of the reverb tail. In a recording context this is used to keep the initial attack of a note clear before the reverb washes in. In a live pedal context it does something similar: it gives each note (and each delay repeat) a moment of definition before the reverberant field wraps around it.

Even a small pre-delay of 20–40ms makes a noticeable difference to intelligibility when delay is running simultaneously. It's one of those settings that's easy to ignore but genuinely changes the character of the combined sound. The Strymon Flint (check price) doesn't expose pre-delay directly, which is one of my few reservations about it; the Walrus Audio Slö (check price) gives you more flexibility in that regard. For a broader look at which reverb pedals offer the most useful parameter control, our best reverb pedals guide breaks that down in detail.

Analog versus digital considerations for this pairing

This comes up a lot. People ask whether an analog delay sounds better with reverb, or whether you need digital for this kind of layered application. Honestly, the answer is more about the character of the effect than the underlying technology.

Analog delays have a natural high-frequency roll-off on repeats — each echo is slightly darker than the last. That can actually work in your favour here, because as the repeats decay they take up less of the high-frequency space where reverb lives. The result is a more organic separation between the two effects. The MXR Carbon Copy (check price) is a good example: the modulation adds a subtle movement to repeats that can blend gracefully with a reverb tail without turning to mush.

Digital delays have flat-frequency repeats, which sound cleaner but can cause more overlap with a bright reverb. That's not a strike against them — it just means the mix level on the reverb may need to sit a little lower to compensate. The Boss DD-8 (check price) at a moderate feedback setting with a short reverb can sound extremely precise, which suits certain playing contexts well.

There's no superior category. The question is what character serves the music. For the kind of clean, articulate jazz tone I'm usually after, I find analog delay with a short digital reverb tends to give me the best of both: warmth in the echoes, accuracy in the space.

A few practical starting points

If you're building this from scratch, here's roughly where I'd start: delay at around 300ms, one to two repeats, mix at 25–30%. Reverb on a room or plate setting, decay at two to three seconds maximum, mix at 20–25%, pre-delay at 20ms if available. Play a few bars of whatever you're actually working on — not a riff, but the real material — and adjust from there. The decay on the reverb is usually the first thing to pull back. Everything else tends to find its place once the tail length is right.

Getting this balance right is, I'd argue, more about listening discipline than gear. The best-sounding delay-plus-reverb rig I've heard in the past year was a guitarist at the Village Vanguard running a modest digital delay into a compact spring unit, both set conservatively. The gear wasn't the point. The space he left in his playing was.

— Marc, Jazz & Clean-Tone Contributor