Slow down any song.
Add reverb. Free.

Why slowed + reverb needs both halves

Slowing the song is half the sound. The reverb is the other half — it puts the slowed voice somewhere, and the somewhere is most of the mood.

At 85% the pitch sinks about three semitones with the tempo — the record-player behaviour, and the reason the vocal turns heavier and closer. Dry, that can sound like a mistake. Add a room and the ear reads it as intended: the track is not slow, it is far away at night. That is the entire genre in one sentence.

Choosing the room

The six rooms run small to large: Air barely wets the sound; Room and Chamber are the classic bedroom-tape warmth; Hall opens it up; Plate shimmers; Cathedral is the long midnight tail. The mix slider decides how far back the song sits — around 30% keeps the vocal present, past 50% the room starts singing instead. There is no wrong answer, only the version you keep replaying.

Where the sound came from

The lineage runs through Houston: DJ Screw slowing records by hand in the nineties until the music turned syrup-thick — chopped and screwed, a whole culture built on a turntable’s pitch fader. The internet rediscovered the move in the 2010s, swapped the chops for reverb, and aimed it at longing instead of swagger; the “slowed + reverb” upload became its own genre of channel, usually with a night drive or an empty mall for a thumbnail. The mechanism above is faithful to both eras — the honest pitch drop of vinyl slowed down, plus the room that made the 2010s version feel like remembering something. There is a longer piece on the Houston half on the chopped and screwed page.

The two-slider craft

The speed sets how heavy the song is; the mix sets how far away it is. Those are the only two decisions, and they pull against each other pleasantly: the slower the song, the more room it can carry before it drowns. At 90% keep the mix low and the room small. At 80% you can afford Cathedral at 40% and it reads as intended rather than as soup. The failure mode is maximums — slowest speed, biggest room, highest mix — which turns any song into fog. Fog is a sound too, but it is rarely the one people come back to.

The export

The whole song, at your speed, with your room, as MP3 or WAV — free. A short spoken note plays after the music ends, and because it is after the end, trimming it off takes seconds if you want it gone.

Start to finish, ninety seconds

The order the job actually happens in.

1. Drop the file. Tap the dashed box or drag the song in. It starts playing at 85% with the Room reverb already on — the sound is there before you have touched anything.

2. Set the weight. The tempo slider is the mood dial: 90% is wistful, 85% is the genre, 80% is heavy. Watch the clock — it shows the real new length, because a slowed song is honestly longer.

3. Choose the room, then the distance. Step through the six rooms while the chorus plays; each is audibly its own space. Then the mix slider sets how far back the song sits. Small moves — five points of mix is a real change.

4. Export. MP3 to post, WAV for an editor. It renders in seconds and the filename keeps the recipe: song (85% + reverb).mp3. If you are choosing between two rooms, export both — renders are free and your ears are better with files than with memory of files.

Phone, laptop, whatever

Mobile Safari, Android Chrome, any desktop browser — same page, same sound, no install, no account. Long files on older phones can hit decode-memory limits; that is the device, not a gate. On iPhone, the app is the sound’s real home: the whole library slowed, each song remembering its own room, offline, with the visualizers drifting behind it.

You love slowed + reverb? There is a player for that.

Not a page you come back to — a music player where slowed is how your music lives. Every song keeps its own speed and its own room, playlists and all, offline.

The app adds what the browser cannot hold: pitch that can unlink from tempo, a five-band EQ to darken the top the way the genre likes, a fuller effect rack, and full-screen visualizers that drift with the slowed beat. Its video export renders the track over a visualizer at 1080p — the exact format the slowed + reverb channels post — with the settings baked in and no other software involved.

No account, works offline, and the core mechanics are free there too. Pro is one payment — forever. Nothing you dialled in here is wasted either: the same numbers make the same sound there, so the recipe travels with you.