To make a slowed + reverb song online, load a track you have the rights to into a free slowed + reverb maker, lower the speed to about 85% while letting the pitch drop with it, then add a large hall reverb with a long decay and a wet mix of roughly 25 to 40%. Finish by trimming muddy mid frequencies with an EQ, adding a soft fade-out and exporting the file as MP3 or WAV.
The Quick Recipe
- Speed: 80 to 90% of the original (85% is the classic sweet spot).
- Pitch: let it drop with the speed, about -2 to -4 semitones.
- Reverb: large hall or plate, 2.5 to 4 second decay, 25 to 40% wet.
- Pre-delay: 20 to 80 ms to keep vocals clear (Sync Pre-Delay picks a tempo-matched value for you).
- EQ: a small cut around 300 Hz, a small lift in the bass.
All free, no sign-up, and your files never leave your device.
What Is Slowed + Reverb?
Slowed + reverb (also written "slowed and reverb" or "slowed reverb") is a style of song edit built from just two ingredients. First, the track is played back more slowly, which stretches the rhythm and lowers the pitch. Second, a large, lush reverb is added, which makes the music sound like it is echoing through a huge space. The result is a darker, dreamier and more emotional version of the original.
You will find these edits all over YouTube, TikTok, Instagram Reels and streaming playlists with titles like "sad songs slowed" or "songs for a late night drive." Many listeners use them for studying, sleeping or simply unwinding. And because the effect is so simple, it is a popular first step for many people trying audio editing for the very first time.
The recipe is simple, but the details make all the difference. Slow a track down a little too much and the vocals turn into a groan. Add too much reverb and everything dissolves into mush. This guide covers where the style came from, the science behind why slowing a song lowers its pitch, the exact settings to use for each mood, and what copyright means if you want to share your edits.
Where the Slowed Sound Came From: From Houston Tapes to TikTok
Slowed + reverb feels like an internet invention, but its roots go back more than three decades. In the early 1990s, a Houston DJ named Robert Earl Davis Jr., better known as DJ Screw, began slowing rap records way down and adding repeats and stutters by switching between two copies of the same record. The University of Houston Libraries credits him with inventing a whole genre known as "chopped and screwed," spread through homemade mixtapes that became part of the city's musical identity.
Years later, the vaporwave scene of the 2010s picked up the same trick of slowing down familiar sounds to make them feel nostalgic and slightly unreal. Then, as video platforms and short-form apps exploded, bedroom creators started uploading slowed versions of songs with heavy reverb instead of the stuttering chops. The "slowed + reverb" label stuck, and today it is one of the most recognizable remix styles online.
Why Slowing a Song Lowers Its Pitch (and Why That Sounds So Emotional)
Pitch is set by how many times a sound wave vibrates per second. When you play a recording at 85% speed, every vibration takes a little longer, so all frequencies drop to 85% of their original value. A singer who hit a note at 440 Hz now sounds at about 374 Hz, which is nearly three semitones lower. The tempo drops by the same percentage, so a 120 BPM song becomes 102 BPM. To dig deeper into how frequency and pitch relate, our guide on what audio pitch is and how to change vocal tone covers it in detail.
Here is how common slowed speeds translate into pitch and tempo. The semitone values come from a simple formula: 12 × log2(speed ratio).
| Playback Speed | Pitch Change | 120 BPM Becomes | How It Feels |
|---|---|---|---|
| 95% | -0.9 semitones | 114 BPM | Subtle, barely noticeable |
| 90% | -1.8 semitones | 108 BPM | Relaxed, still close to the original |
| 85% | -2.8 semitones | 102 BPM | The classic slowed + reverb sound |
| 80% | -3.9 semitones | 96 BPM | Heavy, moody, noticeably deeper vocals |
| 75% | -5.0 semitones | 90 BPM | Very dark, vaporwave territory |
| 70% | -6.2 semitones | 84 BPM | Extreme; vocals start to sound unnatural |
So why does it sound sad? Deeper voices tend to sound calmer and more tired, slower tempos are widely associated with calm, reflective moods, and heavy reverb creates the feeling of being alone in a big, empty room. Put those three together and the brain reads the result as nostalgic, reflective or melancholic, even if the original song was upbeat.
How to Make Slowed + Reverb Songs Online, Step by Step
The workflow below needs no software installation, and most steps take less than a minute.
Step 1: Start With the Best Possible Source File
Slowing a track exposes every flaw in it, so begin with the highest-quality version of a song you own or have permission to use. Converting an MP3 to WAV will not bring back detail the MP3 already lost, but if you only have an MP3, converting it with the Audio Converter stops it from losing more quality each time you move it between tools.
Step 2: Find the Original BPM
Knowing the tempo lets you time the reverb perfectly later on. Drop the file into the BPM & Key Analyzer , or tap along with the beat and count it by hand. Write the number down.
Step 3: Load Your Track Into the Slowed + Reverb Maker
Open the Slowed + Reverb Maker and open your WAV file. Start with the Classic Slowed preset: it sets the speed to 85% with a large hall reverb, which is the sound most people are looking for. The other presets (Sad / Late Night, Lo-Fi, Vaporwave and Sped Up) match the settings table further down, so you can jump straight to a mood and fine-tune from there.
Step 4: Set the Speed and Watch the Pitch
Press Preview and move the Speed & Pitch slider while the chorus plays. The slider changes tempo and pitch together, exactly like a slowed-down record, and the Pitch Shift readout shows how many semitones you have dropped. If the vocals sound too heavy at 85%, move up to 88 to 90%. Want the slower groove but the original key? Use the Pitch & Speed Changer instead, which can slow the tempo while keeping the pitch locked.
Step 5: Shape the Reverb and Sync It to the New Tempo
Choose a reverb type (Large Hall is the classic choice), then adjust the decay and start with a wet mix of about 30%. Lower the Reverb Tone control for a warmer, darker tail. Next, type the original BPM into the tool and click Sync Pre-Delay: it shows the new tempo (120 BPM becomes 102 BPM at 85% speed) and sets the pre-delay to a 1/32 note of that tempo, about 74 ms, so the reverb breathes in time with the music. For other note values, such as timing a delay echo to a quarter note, use the Delay/Reverb Calculator . Our guide on how to calculate delay and reverb times explains the math.
Step 6: Download and Clean Up the Tone With EQ
Keep the Anti-Clip Limiter switched on, since reverb adds energy that can push peaks into distortion, then download your edit as a high-quality WAV. Slowing and reverb both push energy into the lower mids, which is where "mud" lives. In the 3-Band EQ , set the Mid frequency to about 300 Hz and cut it by 2 to 3 dB and, if the track feels thin, a gentle lift of 1 to 2 dB on the Bass. Want an extra-immersive headphone version? Run the result through the 8D Audio Maker for a "slowed + reverb + 8D" edit.
Step 7: Fade, Check Loudness and Export
Let the reverb tail ring out naturally with a long fade from the Audio Fade Tool , then confirm the final level in the LUFS & Peak Analyzer . Keep the WAV as your master, and create a smaller file for sharing with the Audio Converter . Making a video post? The Audiogram Maker turns your audio into a video with a moving waveform.
The Best Slowed + Reverb Settings for Every Mood
There is no single "correct" setting. The values below are reliable starting points for each style. Always finish by listening and adjusting.
| Style | Speed | Reverb Type | Decay | Wet Mix |
|---|---|---|---|---|
| Classic slowed + reverb | 85% | Large hall | 2.5 to 3.5 s | 25 to 35% |
| Sad / late-night edit | 80% | Hall or cathedral | 3.5 to 5 s | 30 to 40% |
| Lo-fi study version | 88 to 90% | Room or plate | 1.2 to 2 s | 15 to 25% |
| Vaporwave | 70 to 78% | Large hall | 4 to 6 s | 40 to 50% |
| Sped up / nightcore (the opposite) | 120 to 130% | Small plate or none | 0.8 to 1.5 s | 0 to 15% |
Reverb Settings Explained in Plain English
In a real room, reverb is the cloud of reflections that keeps a sound alive after it stops. According to HyperPhysics at Georgia State University , acousticians measure it as reverberation time: how long it takes a sound to fade by 60 dB. A general-purpose auditorium sits around two seconds, while recording studios are kept much drier. Slowed + reverb edits deliberately use longer, bigger-than-life settings to create that dreamlike space. Here is what each control does:
- Room size / type: Sets the size of the imaginary space. Hall and cathedral settings sound grand and distant; room and plate settings sound closer and tighter.
- Decay (reverb time): How long the reverb tail lasts. Longer decay equals more atmosphere, but also more blur between chords.
- Pre-delay: A short gap before the reverb starts. Even 20 to 80 ms keeps the dry vocal clear and in front of the echo.
- Wet/dry mix: The balance between the original sound and the reverb. This is the setting most beginners push too far.
- Damping / high cut: Softens the bright part of the reverb tail so it sounds warm rather than hissy.
Slowed + Reverb vs. Nightcore, Daycore and Chopped and Screwed
These terms get mixed up constantly in search results and video titles. Here is how they actually differ:
| Style | Speed | Signature Effect | Overall Mood |
|---|---|---|---|
| Slowed + reverb | Slower (80 to 90%) | Heavy, spacious reverb | Dreamy, nostalgic, emotional |
| Daycore | Slower (70 to 85%) | Lowered pitch, little or no reverb | Deep, calm, heavy |
| Chopped and screwed | Much slower | Live skips, repeats and stutters | Hypnotic, hip-hop rooted |
| Nightcore / sped up | Faster (120 to 130%) | Raised pitch, bright energy | Upbeat, hyper, playful |
For DJs, one extra note: slowing a track changes its key as well as its tempo. If you plan to mix slowed edits together, check the new key on the Camelot Wheel to find transitions that will not clash.
Common Mistakes That Make Slowed Edits Sound Muddy
A slowed edit that sounds like it was recorded underwater almost always suffers from one of the problems below. Each one is easy to fix once you know what to listen for.
1. Drowning the Track in Reverb
When the reverb is louder than the song, the words disappear. If the lyrics are hard to understand, pull the wet mix down by 10% and listen again. The magic is in the tail, not in burying the voice.
2. Slowing Too Far
Below about 75%, most vocals start to sound like slow-motion movie effects. For an even darker mood, add longer decay rather than dropping the speed further.
3. Forgetting That Reverb Adds Volume
Reverb stacks energy on top of the original, so a track that peaked safely before can start distorting afterwards. Keep the Anti-Clip Limiter on when you export, check your peaks, and see our guides on how to prevent audio clipping and how to normalize audio without clipping if you hear crackles.
4. Starting From a Low-Quality MP3
Compression artifacts that were hidden at normal speed become obvious once the audio is slowed down and wrapped in reverb. Always start from the best source available. Our comparison of WAV vs. FLAC vs. MP3 explains why.
5. Ignoring the Low Mids
Lowering the pitch moves everything down into the low mids, roughly 200 to 500 Hz, where bass and reverb pile up. A small EQ cut in that range often does more for clarity than any reverb setting. Our 3-Band EQ guide shows where to cut.
Can You Upload Slowed + Reverb Songs to YouTube, TikTok or Spotify?
This is one of the most common questions about the style, and the answer matters. Changing the speed and adding reverb does not turn someone else's song into your own. Under US law, a recording that is "recast, transformed, or adapted" from an existing work is a derivative work, and the U.S. Copyright Office explains that the right to create derivative works belongs to the copyright owner. Similar rules apply across Europe and most of the world.
In practice, that means a slowed + reverb version of a commercial song can be detected by automated systems like Content ID. The upload may be muted, its ad revenue sent to the rights holder, or the video removed entirely. Repeated strikes can put a whole channel at risk. Uploading edits to Spotify or other streaming services without a license is not permitted at all.
Here is how to enjoy the style safely:
- Slow down your own music. Making an official slowed version of your own song is a popular release strategy for independent artists.
- Use royalty-free tracks whose license explicitly allows modification and redistribution. Read the license terms before publishing.
- Ask for permission. Many independent artists are happy to approve a slowed edit if you ask and credit them.
- Keep personal edits personal. Making a slowed version for your own listening is very different from publishing it.
This section is general information, not legal advice. Copyright rules vary by country, so check with a qualified professional if you plan to publish or monetize remixes.
Where to Go From Here
For a first slowed + reverb edit, keep it simple. Take a track you made yourself or a royalty-free song you like, slow it to 85%, add a hall reverb at around 30% wet, and compare it with the original on headphones. Hearing a familiar melody suddenly turn cinematic is the best way to understand what each setting does.
Once the basic recipe feels natural, experiment with the mood presets in the settings table, try a "slowed + reverb + 8D" version for headphone listeners, and fine-tune your endings with our guide on linear vs. logarithmic fades. For more free audio tools that run directly in your browser, explore the full collection of free tools.
Make Your First Slowed + Reverb Edit
Pick a mood preset, adjust the reverb to taste and download a dreamy slowed version of your own track, right in your browser.
Open the Slowed + Reverb MakerFree, no sign-up, and your files never leave your device.