Slowed Reverb Maker — Slow a Song and Add Reverb, Online Free
The late-night sound: slow a track to ~85%, add space, export — no app, no upload.
Drop a song, or click to browse
MP3, WAV, M4A, OGG, FLAC, and more
Processed locally — your file never leaves this tab
00:00.00 / 00:00.00
Adjust — fades, volume, speed, reverse
Precise times
The slowed + reverb treatment drops a track to roughly 80–90% speed so the pitch sinks with it, then adds a soft echo tail that makes everything sound like it is playing two rooms away. Load a song, drag the speed to about 85%, raise the reverb until it sits right, and export — the whole edit happens on your device, so even full-length tracks process in seconds. Push the speed above 100% instead and you get nightcore.
The slowed and reverb sound
- Drop a track to about 85% and add space. That is the usual late-night mix.
- Start from a dry song. The effect is the slowdown and the reverb together.
- Trim to the section you want before export, so the wash is not the whole album.
How to use the Slowed + Reverb
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Drop your song
Any MP3, WAV, M4A or other audio file — a full album track works fine, processing stays local.
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Slow it and add space
Drag speed to about 85% (the classic spot) and raise reverb to 20–30%. Preview and trust your ears.
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Export the edit
Save as MP3 320 kbps for posting, or WAV if you will edit it further in another app.
The pitch sinks because the speed does
Slowed + reverb drops the speed, usually to somewhere between 80 and 90 percent, with 85 percent as the common starting point. The pitch sinks by the same ratio, the way a record does at the wrong speed. There is no time-stretch that would keep the key.
The reverb is a synthesized decay tail. Start around 20 to 30 percent. Past about 50 percent the track turns into a wash and words get hard to hear.
Nightcore is the same page, the other direction
Push the speed above 100 percent and the pitch rises with it:
- 120 to 130 percent is the usual nightcore range.
- Keep the reverb near zero for a classic nightcore edit.
- Busy hi-hats survive slowing better than a dense, fast arrangement.
Copyright and the neighbouring tools
Slowing a track does not change who owns it. A video upload still needs rights to the original song.
Speed alone, from 0.5× to 2× and without the reverb knob, is the speed changer. A higher or lower key at the same length is the pitch changer. A counted echo that does not change speed is the echo page.
Slowed + Reverb FAQ
What speed should I use for slowed + reverb?
Most edits land between 80% and 90%, with 85% as the usual sweet spot — slow enough that the pitch clearly sinks, not so slow that the rhythm falls apart. Songs with busy hi-hats survive slowing better than dense, fast tracks.
How do I make a nightcore version instead?
Push the speed slider above 100% — typically 120–130%. Raising the speed raises the pitch with it, which is exactly the nightcore sound. Keep the reverb near zero for a classic nightcore edit.
Does slowing change the pitch?
Yes, deliberately — like a vinyl record at the wrong speed. Vocals get deeper and the key drops by the same ratio. That pitch drop is the signature of the style; slowed without pitch change needs a time-stretch editor, which is a different (and heavier) tool.
How much reverb should I add?
Start around 20–30% and listen. The reverb is a synthesized decay tail — past about 50% the track starts sounding like a cathedral and vocals lose their words.
Can I use slowed songs in my videos?
Slowing a track does not change its copyright. For YouTube or TikTok uploads you still need rights to the original song — many creators use the platform’s licensed music library instead and reserve slowed edits for their own recordings.
Does it work on my phone?
Yes. Drag the waveform with a finger. Current Chrome, Edge, Firefox, and Safari on iPhone and Android decode the usual formats. A long file uses more memory, so a desktop is steadier past roughly an hour.
Related tools
Echo
Discrete repeats at a delay you set — from a short slap to a long repeat.
Open Echo
Audio Speed Changer
Speed up or slow down any audio from 0.5× to 2× — right in your browser.
Pitch Changer
Move the pitch up or down by semitones — the length of the file stays the same.