Add reverb to audio online: room, plate, hall, or cathedral, with decay, pre-delay, and brightness controls and a live preview. Free, no upload.
The audio reverb tool adds the sound of a space to a recording. Pick Room, Vocal plate, Hall, or Cathedral, or shape it yourself with four controls: the amount blended with the original, the decay time (how long the tail rings on, from 0.3 to 8 seconds), a pre-delay that leaves a short gap so words stay clear in front of the reverb, and brightness, which darkens the tail the way soft furnishings do. The reverb is generated in your browser rather than sampled from a real room, so it is a clean, general-purpose reverb rather than a copy of a famous hall.
A little goes a long way on a voice: 15–25% makes a dry recording sound finished, while 40% and above pushes it into the distance — the guide to adding reverb has settings for each preset. The export runs slightly longer than the original so the tail can fade out instead of being cut off. Speed and pitch are left alone — for the slowed-down version of this sound use slowed + reverb, and for distinct repeats rather than a wash, the echo effect. Your audio never leaves your device.
Less than you expect. For a spoken or sung vocal, start around 15 to 25 percent with a decay of one to two seconds and a pre-delay of 20 to 40 milliseconds. If the words become harder to follow, lower the amount or shorten the decay. Higher settings work when the distant, washed-out sound is the point.
Decay time is how long the reverb keeps ringing after the sound stops, which the ear reads as the size of the room. Pre-delay is a short gap between the original sound and the start of the reverb. A little pre-delay keeps a voice clear and in front, while none makes the sound sit further back in the space.
The reverb tail carries on after the last note, so the export adds enough time for it to fade out naturally. The extra length is roughly the decay time you set. Without it the tail would be cut off abruptly at the end of the file.
Each preset sets all four controls at once. Room is a short 0.6-second decay with 5 ms of pre-delay at 20% amount. Vocal plate is 1.4 seconds, 25 ms, and 25%. Hall, the starting setting, is 2.8 seconds, 40 ms, and 30%. Cathedral is 5.5 seconds, 70 ms, and 40%. Brightness falls as the space grows, from 9 kHz for Room to 4.5 kHz for Cathedral. Pick one, then adjust any slider.
Yes. Set Reverb amount to 100% and the original drops out, leaving only the reverb, which you can blend under the dry track in an editor; line both files up at the start and they stay in sync. Below 100%, the control is a balance rather than a simple add: as the reverb rises the original falls, so overall loudness stays roughly even. If peaks would clip, the export is turned down just enough to prevent it.