Audio speed changer for audio files

1. Add or drop a file here

Add file

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 this audio speed changer does

Add a file, move the speed slider slower or faster, and hear the new pace.

How to change speed without changing pitch

This tool changes playback speed while restoring the original pitch, so the file can slow down for detailed practice or speed up for fluency checks without drifting to a different key.

When speed change is useful

Speed changes help when you want more time for tricky entrances, cleaner articulation checks, easier phrase learning, or a quicker confidence pass once the material already feels familiar.

Best next steps from here

If the source is already an MP3, WAV, MP4, or video file, open the format-specific guide. If the real goal is keeping the key the same while changing pace, stay with the pitch-steady outcome page and compare a few nearby settings.

Common speed settings to compare

90% is a gentle slowdown that still feels musical, 75% is a common rehearsal setting when a passage needs more breathing room, and 125% or 150% are useful faster checks once the notes already feel stable.

Why this kind of speed change helps

This kind of audio speed changer is handy when you want a quick result without opening a heavyweight editor. It gives you a direct way to test a new pace and keep moving.

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.