Change speed without changing pitch

1. Add or drop a file here

2. Move the speed slider

Need to change BPM while the track is already playing?

Use the BPM Changer extension when you want to slow down or speed up streaming audio in real time and keep rehearsal moving.

Install the extension

Common questions

How do I change the speed of a song or audio file?

Add a local file, choose a preset or move the slider, and let the tool prepare the new version. Lower percentages slow the file down, and higher percentages make it play faster.

Will changing the speed also change the pitch?

No. This tool keeps the pitch steady while changing playback speed, so you can compare the pacing without the file drifting to a different key.

What speed should I try first?

If you are unsure, start with 90% for a light slowdown, 75% for a more obvious rehearsal pace, and 125% if you want to check whether the material still feels comfortable slightly faster.

Does my file stay on this device?

Yes. This tool handles the file locally on your device, so it never needs to be uploaded to a server.

What does the download button export?

The download button exports a WAV result generated locally after the selected change is processed.

Why this matters

Sometimes the real goal is simple: make the file easier to study or quicker to test without making it sound out of tune.

How to use this option

Add a local file, test a slower or faster setting, and listen for whether the pacing still feels comfortable and useful while the key remains the same.

Best next step after you decide

If you find the right amount, open the matching preset for easier revisits. If you are still comparing, stay here and test nearby percentages until the file lands in the right place.

Speed-change basics worth keeping nearby

Keep this quick reference nearby when you are comparing slower and faster versions. It covers what changes when speed moves, how duration reacts, and which practical playback settings musicians reach for most often.

What speed change does

Speed change moves playback earlier or later in time. Lower percentages slow the file down, higher percentages move it faster, and the pitch-preserving process keeps the musical key from drifting with the speed.

Why duration changes matter

Slower playback gives you more time to hear detail, while faster playback shortens the file and helps you test fluency or pacing. Duration is part of the musical feel, not just a side effect.

What to listen for

Compare clarity, articulation, breath points, groove, and whether the phrase still feels natural at the new pace. Small changes are often enough for rehearsal work.

Common applications

  • Slowing down tricky passages for practice without changing the key center
  • Checking whether a vocal or instrumental phrase still feels natural at a brisker pace
  • Preparing slower rehearsal versions before stepping back toward performance speed
  • Comparing groove and articulation without opening a larger editor
  • Making quick practice references that stay in the original key

Practical speed anchors

These are the settings musicians reach for most often when they want a quick slower-or-faster comparison without guessing from scratch.

Setting Multiplier Duration Typical use
50% speed 0.5x 2x duration Extreme slow practice when you need every entrance and subdivision to feel exposed.
75% speed 0.75x 1.33x duration A common rehearsal slowdown when the passage is close but still moving too quickly.
90% speed 0.9x 1.11x duration A small slowdown that keeps the phrase feeling musical while adding breathing room.
100% speed 1x Same duration Original pace for checking how the phrase really sits before or after comparisons.
110% speed 1.1x 1.1x shorter A gentle push when you want to test whether the material stays comfortable slightly faster.
125% speed 1.25x 1.25x shorter A stronger tempo lift for articulation and fluency checks once the notes already feel settled.
150% speed 1.5x 1.5x shorter Fast review mode when you want to pressure-test clarity and pacing.
200% speed 2x 2x shorter A dramatic speed jump for quick navigation or extreme fluency checks.

You may also want

More options

Musician Tools Online

Local music tools for changing key, changing speed while keeping pitch steady, keeping practice tempo steady, and sounding clear reference pitches.