Delay

Time-based effect that creates depth, rhythm, and space — the most-used effect after EQ and compression.

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Delay is repetition. Take an audio signal, hold it briefly, then play it back with the original. That's the whole concept.

The art is in the details: how long is the delay, how many times does it repeat, what processing happens to each repeat, and where it sits in the stereo field.

How Delays Work

A delay buffers the input audio for a set time, then plays it back. The feedback control routes the output back into the input — that's how you get multiple repeats. Each pass through the feedback loop typically gets quieter and (in good delays) slightly degraded.

The four key controls on almost every delay:

Time — how long the delay is, in milliseconds or musical note values.
Feedback — how many repeats you get.
Mix / Wet — how loud the delay is relative to the dry signal.
Filtering — high-pass and low-pass on the feedback path.

Flavours

Digital delay. Clean, precise, perfect repeats. Useful for rhythmic effects where each repeat needs to be distinct.

Tape delay. Modelled after the Roland Space Echo and similar units. Each repeat is filtered, slightly distorted, and pitch-modulated by tape wow and flutter. Warm and musical.

Analogue (BBD) delay. Bucket-brigade-device delays — the sound of an MXR Carbon Copy or similar. Darker, less precise than tape.

Ping-pong delay. Alternates the delay between left and right channels. Creates wide stereo movement.

Reverse delay. Plays each repeat backwards. Creates a swelling, otherworldly texture.

Tempo-Synced Delay

Most delays let you sync the delay time to the song's tempo, set in musical note values:

1/4 (quarter note) — wide, obvious echoes. Good for slow ballads or huge, anthemic moments.
1/8 (eighth note) — workhorse setting. Creates rhythmic momentum.
1/8 dotted — three sixteenth notes long. Creates polyrhythmic complexity, used heavily by U2-style guitar parts.
1/16 (sixteenth note) — fast, busy. Adds energy without obvious "echoing."
1/4 triplet — adds swing feel.

Calculate delay times in ms →

Practical Techniques

Slap delay on vocals. A short (60–120 ms) single repeat with no feedback. Makes a dry vocal sound recorded rather than naked. Heavily used on rockabilly, country, and modern pop vocals.

Mono in, stereo out. Send a mono signal to a stereo delay set to different times left and right (e.g., 1/8 dotted left, 1/4 right). Instant width without phase issues.

High-pass the feedback. A high-pass filter on the delay's feedback path keeps repeats from building up muddy low-end. Same for taming bright repeats with a low-pass.

Delay throws. Automate the delay send up briefly on the last word of a vocal line. The delay sends a single throw without overwhelming the next phrase.

Common Mistakes

Letting delays mask the dry signal. If your delay is louder than your vocal, you've made a delay track with a bit of vocal on it. Pull the wet signal back until the dry stays primary.

Not high-passing. Bass frequencies in delay repeats build up fast. A 200–400 Hz high-pass on the wet signal keeps things clean.

Stacking too many delays in a mix. A song with delay on every element loses its sense of space. Pick one or two elements that genuinely benefit and let the rest stay dry.