This generator turns any song into a slowed + reverb version in one click: slower tempo, a longer reverb tail, and an optional pitch drop. Everything runs in your browser and exports straight to MP3 or WAV.
How to Make a Slowed + Reverb Song in 3 Steps
- Upload a track (MP3, WAV, M4A, FLAC or OGG).
- Press the Slowed + Reverb preset — 87% speed, 35% reverb, 3 semitones down — then adjust any slider to taste.
- Export MP3 or WAV. That's the whole workflow.
What Is Slowed + Reverb?
Slowed + reverb is an edit style: the original track is played slightly slower, a long reverb tail is layered over it, and the pitch is often lowered a few semitones. It started with the chopped-and-screwed remixes DJ Screw made in Houston in the early 1990s, was carried forward by SoundCloud producers, and became a mainstream format once short-video apps made slowed edits easy to share. The three settings above are what the sound actually consists of — tempo, reverb and pitch — and each one is adjustable here.
Recommended Settings by Genre
| Style of track | Speed | Reverb mix | Pitch |
|---|---|---|---|
| Hip-hop / trap | 80%–85% | 30%–40% | −3 to −4 semitones |
| Pop / R&B | 85%–90% | 25%–35% | −2 to −3 semitones |
| Rock / guitar | 85%–90% | 20%–30% | −2 semitones |
| Ambient / lo-fi | 75%–85% | 40%–60% | −3 to −5 semitones |
| Acoustic / vocals | 88%–92% | 25%–35% | −1 to −3 semitones |
Start with the preset, then move one slider at a time — the reverb mix is what most edits get wrong.
Slowed + Reverb vs Nightcore
Both are the same two knobs pushed in opposite directions. Slowed + reverb goes down: tempo under 100%, pitch lowered, reverb added. Nightcore goes up: tempo over 100%, pitch raised, reverb left dry. If you want the fast version of the same idea, use the Nightcore Maker — it shares this engine.
Tune the Reverb Around the Vocal
Begin with the preset, then replay a section where the singer moves quickly between words. A reverb tail continues after each sound, so nearby syllables can overlap when the mix is high. If the lyric becomes hard to follow, reduce reverb before changing the tempo again. Listen to a gap between phrases as well: the tail should support the mood without filling every pause. Recordings that already contain substantial room sound often need less added effect.
Next, listen to the kick, snare, and bass in a louder section. A setting that suits a sparse verse can feel crowded in a chorus. Keep the same speed while comparing two nearby reverb values, such as 30% and 35%, so you can identify the difference. The genre table gives starting points rather than rules. A dry acoustic recording and a heavily processed pop recording can need different mixes even when their tempos are similar.
Choose Between a Practice Track and an Edit
If you want a slower backing track for practice, switch pitch mode off and set reverb to zero. The Song Slower homepage explains that workflow alongside the same controls. If you want a softer, wetter starting point for an edit, the Lofi Slowed + Reverb Maker uses 80% speed, 50% reverb, and four semitones down. You can adjust either preset; changing styles does not require uploading your file to a server.
Speed and pitch remain independent. At 87% speed, a four-minute recording becomes approximately four minutes and thirty-six seconds before any additional effect tail. Lowering pitch alone does not produce that duration change. When matching audio to a video, make the speed decision first, then choose the pitch and space that suit the picture. Use Practice & trim to select an audio passage, then choose Selected section for export. Synchronizing that audio to a video still happens in your video editor.
Preview, Export, and Reuse the File
Preview a quiet passage and the loudest passage before downloading. Changes to tempo and pitch can introduce artefacts, so judge the particular recording rather than assuming one setting is transparent. Export MP3 at 320 kbps for a convenient finished file, or 16-bit PCM WAV for later editing without another lossy encoding step. WAV does not recover information missing from an MP3 source. Keep the original so future versions do not accumulate repeated processing.
The file limit is 200 MB with no separate duration cap. MP3, WAV, M4A, FLAC, and OGG have been tested in Chromium; decoding in other browsers varies. A long recording may exceed available memory even when its file size is allowed, especially on a phone. If processing cannot finish, try a shorter local excerpt. There is no account requirement or limit on the number of exports.