Slowed + Reverb

Slow a track down and add a dreamy reverb tail — the classic social edit. Preview live, then download.

Drop an audio file here

or click to choose from your computer

MP3 · WAV · FLAC · AAC · M4A · OGG

✓ Local processing in your browser · Files are not uploaded to our servers

What is the Slowed + Reverb?

Slowed + Reverb is a popular edit style: reduce the playback speed of a song and wrap it in a soft reverb tail so the track feels dreamier, heavier, and more atmospheric. You hear it constantly on TikTok, YouTube, and SoundCloud — often under late-night, study, or “aesthetic” videos. Sound Booster recreates that sound in the browser: change speed (and pitch with it), set reverb amount, preview, then download a WAV with the effect baked in.

Technically this tool uses resampling for speed. Slowing to ~0.8× lowers pitch slightly and stretches duration; speeding up does the opposite. That classic “tape” behaviour is what most social slowed edits use. Reverb is a delay-based ambience mixed under the dry signal so tails bloom without burying the vocal completely — you can still push it higher for a washed-out look.

One-click vibes cover the common targets: Slowed + Reverb (~0.8× + reverb), Nightcore (~1.3×, brighter and faster), Slowed without much space, Sped Up, and Original to reset. Everything stays on your device — nothing is uploaded to our servers.

How it works

Load a track

Drop MP3, WAV, FLAC, AAC, M4A or OGG, or choose a file from Your Library. Decoding runs locally.

Pick a vibe or fine-tune

Hit Slowed + Reverb, Nightcore, or set Speed and Reverb sliders yourself. Watch original vs new duration update.

Preview and export

Play the effect, A/B with Original, then Download a WAV with speed and reverb rendered in.

Reverb is mixed under the dry path so the core performance stays readable. If you only need speed without space, set Reverb to 0% or use the Speed Changer tool. For pitch changes without tempo shift, open Pitch Shifter with preserve tempo enabled.

Common use cases

Social edits

Build the classic slowed + reverb clip for short-form video in one pass.

Nightcore variants

One click raises speed (~1.3×) for a brighter, faster nightcore-style take.

Practice & study

Slow to 0.5×–0.75× to learn lyrics, lines, or language audio more easily.

Sound design

Half-speed loops with reverb make useful pads and textures for sketches.

Frequently asked questions

How do I make slowed + reverb?

Load a file, click the Slowed + Reverb vibe (or set ~0.8× speed and raise Reverb), preview, then Download.

Does pitch change with speed?

Yes. Resampling links pitch and tempo — the familiar tape-style effect used in most social edits.

How do I make nightcore?

Click the Nightcore vibe (~1.3×). Tweak speed if you want it faster or slower, then export.

Is my file uploaded?

No. Processing and download run entirely in your browser.

What is the output format?

WAV by default (lossless). Convert further with Audio Converter if you need MP3.

Related tools

Keep editing with other browser-based tools on Sound Booster.