Reverb and delay are how you turn a dry, flat recording into something with space and depth. Used well they’re invisible glue; used badly they bury your mix in mush. Here’s how to get them right.
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Use sends, not inserts
Put reverb and delay on send/return channels so multiple tracks share the same space – it sounds more cohesive and uses less CPU than a separate reverb on every track. If you’re not sure how that routing works, our guide to setting up sends and returns in a DAW walks through it step by step.
Reverb basics
- Room/plate reverbs are versatile for vocals and drums; halls are big and lush.
- Set pre-delay (a short gap before the reverb) to keep the dry signal clear and up front.
- Roll off the lows and highs of the reverb so it adds space without mud or harshness.
Delay basics
Sync delay time to the song’s tempo (e.g. 1/8 or 1/4 notes) so it feels musical. A short slap delay thickens vocals; longer delays create depth. Pan delays for width.
The golden rule: less than you think
Set the effect while soloed, then cut it roughly in half in the full mix – you should feel the space more than hear it. This fits into the wider order of operations in our mixing guide, and pairs with EQ and compression. It also helps to understand how much of each effect actually reaches the output, which is really a question of the dry versus wet signal balance.
Reverb and delay do different jobs
It helps to think of these two effects as answering different questions. Reverb answers “what room is this sound in?” – it’s a dense wash of reflections that places a source somewhere believable, from a tight booth to a cathedral. Delay answers “how far away is it, and how wide?” – it gives you discrete repeats you can hear and place rhythmically. Because reverb is the busier, denser effect, it tends to clutter a mix faster, so many engineers reach for delay first to create depth and only add reverb where a source genuinely needs to sit in a space.
A useful mental model is depth on a stage. Dry, present, low-effect sounds feel close to the listener. As you add pre-delay, longer tails and more delay repeats, sources move further back. Keeping your most important element – usually the lead vocal – relatively dry while pushing supporting parts deeper is one of the quickest ways to make a flat mix feel three-dimensional.
How to choose the right reverb
There’s no single “best” reverb – the right choice depends on the source and the feel you want. Use these starting points and trust your ears:
- Plate – smooth and dense with no obvious room character. Flattering on vocals and snare, and a safe default when you’re unsure.
- Room – short and natural. Great for gluing drums together or adding subtle realism without obvious “effect”.
- Hall – long and lush. Beautiful on ballads, pads and orchestral material, but it can swamp a busy, up-tempo arrangement.
- Spring – the boingy character associated with guitar amps. A flavour choice rather than a realistic space.
Two controls do most of the heavy lifting. Decay time sets how long the tail rings out – shorter tails on faster songs so the reverb clears before the next note. Pre-delay separates the dry sound from its reflections; a few tens of milliseconds keeps a vocal intelligible even with a generous tail behind it. If a part still sounds cluttered, EQ the reverb return rather than the decay: a high-pass filter around the low mids stops the tail building up mud, and a gentle high cut tames any harsh sizzle. You don’t need to spend money to get a good one either – there are plenty of great free reverb plugins that cover plate, room and hall.
Making delay sit in the groove
Tempo-synced delays almost always feel more musical than random millisecond values because the repeats land with the beat. Dotted-eighth delays are a classic for creating motion without obviously doubling the part, while quarter-note delays give clear, rhythmic echoes. If a delay starts competing with the dry signal, roll off its high end so each repeat sounds a little duller and further away, and add a touch of its own reverb so the repeats melt into the background instead of stabbing through.
For width, try a ping-pong or stereo delay on a part that lives in the centre, then keep the dry signal mono. The repeats spread to the sides while the source stays anchored, which widens the mix without smearing the focus. As always, set it up soloed, then pull the send back in context – what sounds exciting in solo is usually too much in the full track.
Common mistakes to avoid
- One reverb on everything at the same level. Different sources need different amounts; a single global wash flattens the depth you’re trying to create.
- No pre-delay or EQ on the return. This is the fastest route to a muddy, distant mix. Carve the lows and highs out of every time-based effect.
- Judging effects in solo. Reverb and delay only have to work in context. Always check – and cut back – with the full mix playing.
- Long tails on a fast song. If the reverb hasn’t cleared before the next phrase, the mix turns to soup. Shorten the decay to match the tempo.
- Reaching for reverb when delay would do. Delay adds depth with far less clutter, so try it first on busy arrangements.
Frequently asked questions
Should I use reverb or delay on vocals?
Most modern vocals use a little of both. A short slap or eighth-note delay thickens and adds movement while keeping the words clear, and a touch of plate reverb places the voice in a space. Lead with delay if you want the vocal to stay present and intelligible, and add only as much reverb as the song’s mood needs. For the bigger picture on how these fit alongside tuning, doubling and saturation, see our guide to adding vocal effects.
How much reverb is too much?
If you can clearly hear the reverb as a separate effect when the full mix is playing, it’s probably too much. Aim to feel the space rather than notice the tail. The soloed-then-halved approach is reliable: dial it in on its own, then cut the send roughly in half once everything else is playing.
Why does my mix sound muddy after adding reverb?
Reverb adds low-mid energy that piles up across multiple tracks. High-pass the reverb return so the tail no longer carries those low frequencies, shorten the decay, and add pre-delay to separate the wet signal from the dry. Sharing one or two return channels rather than putting a separate reverb on every track also keeps things far cleaner.
