Slow down music without changing pitch
Speed and pitch are different things. An eight-second phrase takes about sixteen seconds at 0.5×, but pitch-preserving playback aims to keep the notes at their original pitch. You get more time to hear the notes and rhythm, and can compare what you hear with your instrument without the whole song dropping an octave.
This is not transposing. Transposition moves the notes of a piece up or down by the same interval; its speed can stay the same. Here, the speed changes while the original pitch is preserved as closely as possible.
Why does ordinary slowdown lower the pitch?
Slow a recording down like a tape machine and its vibrations slow down too. At half speed, the pitch drops by an octave. That is not helpful when you are trying to work out the notes in the original recording.
Pitch-preserving slowdown lengthens the sound in time and applies processing to keep its pitch close to the original. Different players use different methods, but the aim is the same: more time between the notes without moving the whole song into another key.
How to practise with a slower recording
- Listen once at normal speed. Notice when the part you want to learn enters, and where the accents and phrases fall. Normal speed is your reference; you do not have to play along yet.
- Slow only the passage you need. Choose a short phrase and reduce the speed until you can distinguish its notes or movements. If you need to hear it repeatedly, loop that section rather than keeping the entire song slow.
- Try it on your instrument, then check at normal speed. For a guitar phrase, for example, use slow playback to check the order and pitch of the notes. Play it at a speed you can control, then return to the original to check its timing and feel. Hearing the right notes and playing them securely at full speed are separate tasks.
Slow practice still counts as practice time. When you play a song or video you have added to your library in Practice mode, the practice log counts the real time spent playing, not the amount of video timeline covered or a duration adjusted for playback speed. Play a 30-second passage once at 0.5× and it takes one minute: the log records one minute. Pauses do not count.
If you are working out unfamiliar notes by ear, start with a short phrase using this learn-by-ear method. Slowing down gives you more listening time; it does not identify chords or generate notation for you.
The pitch may stay, but the sound can change
Preserving pitch does not preserve every detail of the sound. At slower speeds, drum and picked-string attacks or the ends of sung notes may blur or sound grainy. The result varies with the recording and the device; there is no speed at which every recording is guaranteed to sound untouched.
If a phrase sounds strange at a very low speed, shorten the loop, try a less extreme slowdown, then check it again at normal speed. Slowing down can reveal a fast detail; the original tempo is still where you hear the song's full rhythm, articulation and dynamics.
YouTube videos and your own files
You can slow and loop a YouTube video that allows embedded playback. It stays in YouTube's player; we do not download or extract its audio. Practising with YouTube is free and needs no account.
Uploading your own audio or video files is free, but requires a free account. Those files can be slowed too; by default, each stays on the device where you added it. Uploading a file is separate from splitting it into tracks; slowdown by itself does not require Pro.
The pitch-preserving path depends on the source. For YouTube videos, YouTube's own player handles speed and pitch. For local files, supported desktop browsers use MIT-licensed Signalsmith Stretch to help preserve pitch; Safari, phones and tablets use the browser's built-in pitch preservation instead. The sound at slow speeds may therefore differ between devices.
FAQ
What is the difference between slowing down and transposing?
Slowing down changes how long the music takes; transposing moves all its notes up or down by the same interval and need not change its speed. This guide keeps the original pitch while changing speed. With your own supported audio or video file, you can also transpose its playback pitch separately. The original audio of an embedded YouTube video cannot be transposed here.
Will 0.5× playback sound worse?
You may hear graininess or blurred attacks, particularly on drums and picked notes. It depends on the recording and player. Use the slower speed to find details, then check the phrase again at normal speed.
Can I use both YouTube videos and my own files?
Yes. A YouTube video must allow embedded playback; your own audio or video must be a file you have the right to use. Both sources have speed control, but they use different playback and pitch-preserving paths.
Do I need to pay or sign up?
You can slow and loop an embeddable YouTube video without paying or signing up. Adding your own file requires a free account; pitch-preserving slowdown itself does not require Pro.
Choose one passage that feels too fast. Hear its shape at normal speed, slow it to check the details, then return to the original tempo.