Guide

What Is Slowed and Reverb?

Slowed and reverb explained: what the effect is, where it came from, from DJ Screw to YouTube and TikTok, why it sounds nostalgic, and how to make your own.

Slowed and reverb is a style of remix in which an existing song is played back slower than its original tempo, which also lowers its pitch, and then has reverb added so the sound seems to come from a large, distant space. The result is a heavier, dreamier, more nostalgic version of the original. Written as "slowed + reverb" in video titles, the style grew out of Houston's chopped and screwed scene and became one of the most common forms of fan edit on YouTube and TikTok.

That is the definition. The rest of this page covers where the sound came from, why it affects listeners the way it does, the settings that define it, how to make one with the free slowed reverb maker, and how it relates to nightcore, daycore and the other speed-based styles.

The two ingredients

Slowing. A recording played at 0.85x takes about 18 percent longer and, unless the pitch is deliberately preserved, drops in key by roughly three semitones. Every element of the mix moves down: the vocal sits lower in the singer's chest, the kick drum gets longer and softer, the hi-hats lose their sizzle. Most slowed + reverb edits sit between 0.80x and 0.90x. Below about 0.75x, vocals start to smear and the style tips into something more abstract.

Reverb. A reverb effect simulates the reflections of a room by blending a decaying copy of the sound back in with the original. Two settings matter: how much of the reverberated copy you hear (the wet mix) and how long the tail lasts (the decay). Slowed + reverb edits typically use a moderate wet mix, around 30 to 55 percent, with a decay of two to four seconds. That is enough to place the song in a hall without drowning the words.

Together they do something neither does alone. Slowing makes the song heavier; reverb makes it distant. Heavy and distant is what the ear reads as memory.

Origin: from Houston to YouTube to TikTok

The idea of slowing records for effect belongs to DJ Screw, a Houston DJ who in the 1990s built a whole sound, called chopped and screwed, by pitching rap records down on turntables and chopping between two copies to repeat phrases. His mixtapes, known as Screw tapes, defined a regional style that persisted long after his death around the turn of the millennium. The slowed, pitched-down, syrupy feel of slowed + reverb is a direct descendant.

The modern version arrived in the late 2010s, roughly 2017 to 2019, when YouTube channels began uploading songs with "slowed + reverb" in the title, usually over a single still image or a looping clip. The reverb was the new addition. Where chopped and screwed used chops and scratching, the YouTube version used only the two effects in the name, which made it easy to produce and easy to recognise. Channels dedicated to the style accumulated large audiences, and the format spread to R&B, pop, indie and film music.

TikTok took it mainstream in the early 2020s. Slowed versions of songs often circulated as background audio for videos, sometimes more widely than the originals, and labels responded by releasing official slowed versions as singles. The longer history, with the people and the turning points, is on the blog in history of slowed and reverb.

Why it sounds the way it does

Three things happen when you slow a recording and add a room.

Lower pitch reads as weight and intimacy. Voices pitched down a few semitones sound larger and closer to the chest. The same effect makes a low-voiced narrator sound authoritative. Applied to a pop vocal, it turns brightness into warmth.

Longer transients read as calm. Drum hits and consonants are the sharpest events in a mix. Slowed, they stretch and soften. The music feels less urgent even when the melody has not changed.

Reverb reads as distance, and distance reads as the past. A dry vocal is in the room with you. A reverberated one is somewhere else. Combined with the slowed tempo, the song sounds overheard rather than performed, which is close to how memory presents music to us. That is the nostalgia people describe, and it works even on songs the listener has never heard before. The blog post why slowed and reverb hits so hard goes deeper on the perception side.

There is also a technical reason it flatters compressed audio. Slowing shifts the harsh top end of a low-bitrate file downward, and reverb fills the gaps the encoder left. A slowed version of a mediocre MP3 can sound smoother than the source.

Typical settings

Bass boost and darker tone are not in the name, but nearly every good slowed edit uses them. Slowing moves energy downward and dulls the top; a few dB of low shelf restores the weight and a negative high shelf hides the stretch artifacts.

How to make a slowed and reverb song

1. Pick a source with space in it. Sparse arrangements and mid-tempo or faster songs slow well. Dense, busy mixes turn to mud.
2. Open the slowed reverb maker and drop in an MP3, WAV, AAC, OGG or FLAC file. Nothing is uploaded; processing runs in your browser.
3. Choose the Haze Chamber preset for the deep classic sound or Wave Drift for something lighter, then adjust. Set speed first, then reverb, then bass and tone.
4. Leave Preserve pitch off. The pitch drop is the point of the style.
5. Check that you can still understand the chorus. If not, lower the reverb mix before anything else.
6. Export. The editor gives you an MP3 at 96 kbps, 32 kHz, encoded locally. For YouTube, TikTok and Shorts that is fine, because they re-encode. For a distribution master, start from WAV and finish in a DAW.

The step by step with reasons is in the complete guide to making a slowed and reverb song. For many tracks at once, the editor's batch mode applies one setting to every selected file and exports a ZIP.

Related styles

Chopped and screwed is the ancestor: slowed and pitched down, with chopped repeats and scratches, from 1990s Houston. Slowed + reverb drops the chops and adds the room. The chopped and screwed maker page covers what a speed-only tool can and cannot do for that sound.

Daycore is slowed with little or no reverb, named as the opposite of nightcore. It keeps the pitch drop but stays dry. See what is daycore.

Nightcore goes the other way: sped up to around 1.25x to 1.40x, pitched up, bright and energetic. See what is nightcore.

Sped up is the TikTok era's lighter version of nightcore, usually 1.10x to 1.25x, with the pitch rising a little. The slowed vs nightcore vs daycore comparison lays all of these out in one table.

Lo-fi overlaps in mood but is a production style rather than a remix style; it uses tape hiss, vinyl crackle and filtered samples. A slowed + reverb edit with darker tone drifts toward lo-fi territory.

Copyright, briefly

A slowed + reverb version of someone else's song is a derivative work. Slowing does not remove the copyright, and platform matching systems recognise slowed versions. On YouTube the usual outcome is that the rights holder claims the video and takes any revenue while the upload stays up; on some tracks the result is a block. If you want to monetise, use music you own or have licensed.

Open the free editor: upload MP3, WAV, AAC, OGG or FLAC, adjust speed, reverb, bass, tone, width and space, then export MP3 or a ZIP of many tracks. Everything runs in your browser.