Cut a Moody Video Edit
Slow a song to 0.85x for a moody clip, then trim the WAV in your editor.
For example
- Mood edits
- Transitions
What the Slowed and Reverb Generator Does to a Song
The slowed and reverb generator plays your track slower, the way a record does at the wrong speed, so tempo and pitch drop together, then washes it in reverb and rolls off the highs. At the default 0.8x, a 120 BPM song becomes 96 BPM and sits about 4 semitones lower; at 0.5x it is a full octave down. The reverb is a synthetic 2-second room mixed with the dry sound, and it adds 2 seconds of tail to the end of the file so the last note fades out instead of ending abruptly.
Three Dials on the Slowed and Reverb Generator
Each dial has a range and a starting value; change one, press Apply, and listen.
Speed From 0.5x to 1.0x
Speed moves in 0.05 steps from a 0.8x start. Pitch follows speed: 0.9x is about 2 semitones lower, 0.75x is 5 lower.
Settings
0.05x Steps
From 0.5x up to 1.0x
Starts at 0.8x
About 4 semitones lower
BPM Drops Too
120 BPM at 0.8x is 96
What the Slowed and Reverb Generator Gives You
A focused effect with numbers you can check.
01Private
Stays on Your Device
Decoding, effects and export all run in the browser; the file is never uploaded.
02Pitch
Pitch You Can Predict
Every 0.05x step changes the pitch by a known amount, so 0.8x is always about 4 semitones down.
03Tail
Natural Fade-Out
Reverb adds 2 seconds to the end, so the slowed and reverb version does not cut off mid-echo.
04Formats
Seven Formats In
MP3, WAV, OGG, FLAC, AAC, M4A and WebM files up to 80 MB.
05Preview
Listen Before Saving
Apply your settings, play the render, then adjust and render again until it sounds right.
06Free
No Credits Used
The slowed and reverb generator is free to use and does not touch your mashup credits.
Who Reaches for a Slowed and Reverb Generator
Six ways people put the slowed and reverb generator to work.
Make a Slowed Mashup
Run a finished mashup MP3 through the slowed and reverb generator at 0.8x for a slowed cut of the same mix.
For example
- Slowed mashup
- Alt version
Soften a Late-Night Song
Set 0.75x and a 1000 Hz low-pass for a softer copy of a favorite track.
For example
- Study playlist
- Wind-down
Pitch Down a Sample
Drop a loop in and hear it 4 to 5 semitones lower before you sample it in your DAW.
For example
- Pitched-down loop
- Intro texture
Build a DJ Intro
Build a slowed intro or outro and know its new BPM in advance.
For example
- Set intro
- Ending
Test a Lower Key
Play a backing track at 0.9x to test a key about 2 semitones lower.
For example
- Key check
- Practice take
Use the Slowed and Reverb Generator in Three Steps
Files can be up to 80 MB and 5 minutes long on a computer, or 2 minutes on a phone.
- 1Step
Add an Audio File
Drop in an audio file you have the rights to use.
- 2Step
Set Speed, Reverb and Low-Pass
Keep 0.8x, 40% and 2000 Hz or move the dials, then press Apply.
- 3Step
Listen and Save the WAV
Play the render, adjust if needed, then download the WAV.
Slowed and Reverb Generator Questions
Pitch math, settings, files and rights.
What does a slowed and reverb generator do to a song?
A slowed and reverb generator lowers the speed of a track, which also lowers its pitch, then adds reverb so the sound feels larger and further away. This one also has a low-pass filter that softens the highs, the third part of the familiar slowed reverb sound.
How much lower does the pitch go at each speed?
Pitch drops by 12 times the base-2 log of the speed, in semitones. In practice: 0.95x is about 1 semitone lower, 0.9x about 2, 0.8x about 4, 0.75x exactly 5, 0.7x about 6, and 0.5x a full octave. Tempo falls by the same ratio, so 120 BPM at 0.8x is 96 BPM.
Which speed, reverb and filter values give a classic slowed reverb sound?
A common starting point is 0.8x speed, 40% reverb and a 2000 Hz low-pass, which is also what the tool uses by default. For a lighter touch try 0.9x, 20% and 4000 Hz; for a heavier, darker take try 0.7x, 60% and 1000 Hz. These are suggestions, so adjust by ear.
Can I slow a song down without changing its pitch?
Not with the slowed and reverb generator. Speed and pitch are tied together on purpose, because that drop is what gives a slowed version its sound. If you need the original key at a lower tempo, this tool is the wrong fit.
Does the slowed and reverb generator cost anything or need an account?
Free, with no credits used and no account needed for the effect itself. Your file is decoded, processed and exported inside the browser and is never uploaded to a server.
Which files and lengths does the slowed and reverb generator accept?
MP3, WAV, OGG, FLAC, AAC, M4A and WebM files up to 80 MB, up to 5 minutes on a computer or 2 minutes on a phone. It needs a file on your device; YouTube and other streaming links are not supported. The result downloads as a 16-bit WAV.
Can I make a slowed version of a mashup?
Yes. Download your MP3 from the mashup maker, open it in the slowed and reverb generator, and apply the settings you want. Keep in mind that slowing a song changes its BPM, so a slowed track may no longer pair with another song inside the 12% tempo gap the mashup maker accepts.
Who owns a slowed and reverb edit of someone else's song?
The original song still belongs to its rights holders. An edit made with the slowed and reverb generator is for personal listening unless you have permission, and platforms can mute or remove posted edits over copyright. Process only audio you own or are allowed to use.
Other Free Audio Tools
Two more browser tools that pair well with the slowed and reverb generator.
