Slow Down Audio
Slow a song, solo, or recording to 0.9x, 0.75x, 0.6x, or half speed and keep it in the same key. Made for learning by ear, and it runs in your browser, so nothing is uploaded.
How to slow down audio without changing the pitch
- Drop in a song or recording (MP3, WAV, M4A, FLAC, OGG, or AAC).
- Pick a speed: 0.9x, 0.75x, 0.6x, or half speed.
- Leave Keep original pitch on to stay in the same key, or choose tape style for the lower, slowed sound.
- Press Slow down, check the preview, then download it as MP3 or WAV.
Slower, but still in tune
Slow a record down on a turntable and it drops in pitch, which is fine for a mood and useless if you are trying to learn the part. A guitar line slowed to 0.75x that way lands about five semitones lower, so nothing you play along with will match. This tool keeps the key. It uses FFmpeg’s atempo time stretch, which lengthens the audio in small overlapping slices so each note lasts longer at the same pitch.
If the lower, heavier sound is what you are after, pick tape style and the pitch drops along with the speed, the core of a slowed edit.
Built for learning by ear
The classic use is transcription. A fast solo at 0.75x becomes something you can follow note by note, and at 0.5x even quick runs come apart into individual notes. Guitarists and pianists use it to learn riffs and voicings, singers to catch fast melodic runs, drummers to work out fills, and dancers to learn choreography at a pace they can follow before bringing it back to full speed.
It helps with speech too. Slowing an interview, a lecture in a second language, or a fast talker to 0.75x or 0.9x makes it much easier to transcribe by hand or follow word by word.
How slow you can go before it sounds strange
Down to about 0.8x, time stretching is hard to notice on most material. At 0.6x and especially 0.5x you will hear it: long notes can wobble slightly, drum hits lose their snap, and voices take on a phasey, smeared texture. For practice that is a fair trade, since the point is hearing the notes clearly, but it is worth knowing before you share the result.
A good routine is to learn a part at 0.6x or 0.75x, move up to 0.9x, then play along at full speed. If you share a slowed version of someone else’s song, publishing it generally needs permission from the rights holders; slowing a track down to practice with is a different matter.
Slow Down Audio or the Pitch Changer?
This page is the quick route: pick a speed, get a file. The full Pitch Changer / Varispeed tool lets you set speed and pitch independently, preview changes live, and adjust in small steps, which helps when you need an exact tempo. For the lush slowed and reverb sound rather than practice, the Slowed + Reverb Maker is built for that.
Slow down audio: common questions
Can I slow down a song without changing the pitch?
Yes, that is the default. Keep original pitch slows the tempo while the song stays in the same key, so you can play or sing along in tune.
What speed is best for learning a song by ear?
Start at 0.75x for most parts. Very fast solos are easier at 0.6x or 0.5x. Once you can play a part, step up to 0.9x before trying full speed.
Is my file uploaded anywhere?
No. Everything runs in your browser with FFmpeg compiled to WebAssembly. Your file never leaves your device, and we never see it.
Why does half speed sound a bit strange?
Stretching audio to twice its length means the algorithm has to fill in a lot of time. At 0.5x that shows up as a slight wobble on long notes and softer drums. It is still clear enough to pick out notes.
What is the difference between Keep original pitch and tape style?
Keep original pitch changes only the tempo. Tape style works like slowing a record down, so the pitch drops with the speed. At 0.75x that is about five semitones lower.
Can I slow down just one part of a song?
Cut the section you want with the Audio Cutter first, then slow that clip down here. Short loops are easier to practice with anyway.
Can I slow down the audio from a video?
Yes. Drop in the video file and you get its audio back, slowed down, as MP3 or WAV. The video picture is not kept.
Is it free?
Yes. No sign-up, no watermark, and no cap on how many files you slow down.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools run on the same idea: your audio stays on your device. If you're curious about the bigger thing, take a look.