Space & Width: Reverb, Echo/Delay and Stereo Widening (Free, Online)

Volume and EQ shape a mix front to back and top to bottom — but the sounds that stop you cold live in a third dimension: space. Depth is how far away something feels; width is how far it spreads left and right. A dry, centered vocal sits flat against your speakers. Give it a room, a repeat that rings into the gap after a line, and a stereo field that wraps around the listener, and the same recording suddenly feels like a record.

Three effects own that dimension. Reverb puts your sound in a space and pushes it back into the distance. Echo and delay repeat it in time, filling the silences with rhythm and tails. Stereo widening stretches the image sideways so the mix feels bigger than the speakers it's playing on. This guide covers all three — what each one is for, how to dial it in, and how they stack — using free browser tools that never upload your audio and run fine on a phone.

#Stadium Reverb: depth and drama

Some sounds need to feel enormous — a vocal that fills an arena, a beat that echoes off the back wall. The Stadium tool drops your track into a giant, bright room with a long open tail and that signature arena slap. Two knobs, and a dry recording turns cinematic.

#What the Stadium reverb is for

Reverb is the sound of a space — the reflections that tell your ear how big a room is. Stadium leans into big: long decay, lots of air, a bright open character. Use it to:

• Make lead vocals sound huge and dramatic
• Give a beat or drop a cinematic, larger-than-life scale
• Add depth and distance behind a part

#Make it huge

1. Open the tool and load your audio.
2. Set Size (20-100%, default 70%). This is the room size and tail length. Bigger Size means a longer, more cavernous reverb that washes out further.
3. Set Bright (0-100%, default 60%). This is the brightness of the reverb. Higher Bright gives an airy, sparkling tail; lower Bright gives a darker, warmer space.
4. Preview and export.

#Start from a preset

• Stadium — a huge, bright wash, the full arena treatment.
• Cathedral — an endless, dark tail for the most cavernous feel.
• Concert Hall — big but controlled, lush without washing everything out.

#Tips for a better big room

• For drama on a lead vocal, push Size high and keep Bright up for that sparkling arena tail.
• If the reverb sounds harsh or hissy, pull Bright down toward a darker, warmer space.
• The Cathedral preset is your go-to for cinematic, ominous, slow-decay moods.
• A little Stadium goes a long way on a full mix — it's best as a feature on one part, not the whole song.

#Stadium reverb FAQ

What's the difference between Size and Bright? Size sets how long and large the reverb tail is; Bright sets how airy or dark that tail sounds.

Which preset is the biggest? Cathedral has the longest, darkest tail; Stadium is the brightest huge wash; Concert Hall is the most controlled.

Make it sound enormous — open the Stadium tool and start with the Stadium preset.

#Echo & Dub Delay: rhythm and tails

Echo is the cheapest depth you can buy — except here it's free. A short delay tucks a vocal into a pocket; a long, feeding-back delay sends a snare flying across the mix and ringing out. The Echo / Dub Delay tool gives you feedback echo with a darkening tape-style tail, so each repeat gets a little softer and warmer as it fades — exactly how the classic dub records did it.

#What echo and dub delay are for

A delay repeats your sound. How fast it repeats, how many times, and how loud those repeats are decides whether it reads as a tight double or a cavernous throw:

• Slapback — a single quick repeat that thickens vocals and guitars (think 50s rock and rockabilly)
• Dub throws — long, feeding repeats that ring out for reggae, dub, and dramatic moments
• Rhythmic space — repeats timed to the groove that fill gaps between phrases
• Tails and transitions — let a word or hit echo into the next section

Because the tail darkens as it decays, the repeats sit behind your dry sound instead of cluttering it.

#Step by step

1. Open the Echo / Dub Delay tool and load your audio.
2. Set the delay time with Time (60–1000ms, default 350ms). Short times give tight slapbacks; long times give spacious, dub-style throws.
3. Choose how many echoes with Repeats (0–85%, default 45%). This is the feedback — higher values mean more repeats that take longer to die away.
4. Blend it in with Mix (0–80%, default 40%). Low Mix keeps the echo subtle and behind the dry signal; higher Mix brings the repeats forward.
5. Preview and export.

#Start from a preset

• Slapback — a tight 50s slap. One quick repeat, perfect for vocals and guitars.
• Dub — long, dark throws that ring out. The classic reggae/dub sound.
• Quarter — a spacious repeat that leaves room between echoes.

#Tips for cleaner echoes

• More Repeats needs less Mix. When you push Repeats high for long throws, pull Mix back so the build-up doesn't swallow the dry sound.
• Slapback wants short Time, low Repeats. Keep Time down near the bottom of its range and Repeats low for a clean double.
• Long Time + high Repeats = dub. That's the recipe for repeats that ring and slowly darken into the distance.
• Automate by section. Drench a single word at the end of a line, then go dry — that contrast is the whole effect.

#Echo & delay FAQ

What do Time, Repeats, and Mix each control? Time is the delay length (60–1000ms). Repeats is the feedback — how many echoes you get and how long they last (0–85%). Mix is how loud the echoes sit against the dry sound (0–80%).

Why do the echoes get darker? The tail uses tape-style darkening, so each repeat is a little warmer and softer than the last. That keeps long throws from sounding harsh and helps them sit behind your mix.

Open the Echo / Dub Delay tool and send your sound flying.

#Stereo Widening: size and spread

Width is what makes a mix feel big. Pull the sides out and a track wraps around the listener; pull them in and everything tightens toward the center. The Stereo Widener tool does both with a single Width knob — open up an immersive stereo image, collapse toward mono, or give a mono file a subtle spread.

#What stereo widening is for

The stereo field is the left-to-right space your sound lives in. Adjusting how far the sides spread changes how the whole thing reads:

• Wider — a bigger, more immersive mix that fills the room
• Narrower — a tighter, more focused, centered sound
• Mono-safe checking — collapse to mono to make sure nothing disappears
• Subtle spread on mono files — give a flat, centered source a gentle sense of width

#Step by step

1. Open the Stereo Widener tool and load your audio.
2. Set the stereo spread with Width (0–200%, defaulting around 160%). Here's the scale:
   • 0% collapses everything to mono.
   • 100% is the original, untouched width.
   • Above 100% pushes the sides out for a wider image, up to 200% at the extreme.
3. Preview and export.

One knob, but it covers the full range from dead-center mono to maximum spread. Mono source files get a subtle spread rather than nothing, so even a flat recording gains a little dimension.

#Start from a preset

• Wide — big and immersive at 160%. The everyday "make it bigger" setting.
• Huge — maximum spread at 200%. For when you want the widest possible image.
• Narrow — tighten to center at 50%. Pulls the sides in for a focused, more mono sound.

#Tips for a wider-sounding mix

• Widen the whole mix gently. Big moves like Huge are best on pads, ambiences, and effects rather than a full mix where you want the kick and vocal locked center.
• Narrow for focus. When a mix feels smeared or unfocused, the Narrow preset can pull it back together.
• Mono files spread subtly. Don't expect a true stereo from a mono source — you'll get a gentle sense of space, which is exactly the point.
• More width can mean less center. As you push past 100%, the middle can feel a touch less solid. Find the spot where it's wide and still punchy.

#Stereo widening FAQ

What does the Width knob do? Width sets the stereo spread from 0 to 200%. 0% is mono, 100% is the original width, and anything higher pushes the sides out for a wider image — up to 200% at maximum.

What happens if I widen a mono file? A mono source gets a subtle spread rather than no effect, giving an otherwise flat, centered sound a gentle sense of width.

Open the Stereo Widener tool and make your mix bigger.

#How they stack

Each of these effects owns a different axis of the same third dimension, so they layer without fighting:

• Reverb is depth. Stadium pushes a sound back into a space and tells the ear how big the room is. Use it to place a part in the distance and make it dramatic.
• Delay is rhythm. Echo fills the time between phrases — a slapback thickens, a dub throw rings into the gaps. Because the repeats are discrete, delay adds space without the wash a long reverb brings, which is why it stays cleaner on busy parts.
• Widening is size. The widener stretches the whole image sideways so everything — including your reverb tails and echo throws — spreads across a bigger canvas.

A sensible order: shape the part first, add delay for rhythm, add reverb for depth, then widen the result. And restraint compounds — a little Stadium goes a long way, heavy Repeats want less Mix, and pushing Width past 100% costs a little center. Feature one big effect per part, keep the others supporting, and check the result in mono before you commit.

Every tool here is free, runs entirely in your browser with nothing uploaded, and works on your phone. Open the Quick Tools and give your mix its third dimension.