Audio Speed Changer Online - Speed Up/Slow Down Songs (2025)
Speed up or slow down audio without changing pitch. Adjust playback speed from 0.5x to 2x. Free online audio speed controller for practice.
💡 Better Way: Create with AI Music
Instead of processing existing files, generate original music with AI first, then adjust speed freely! No copyright issues, fully commercial-use.
Online Audio Speed Changer
Popular Use Cases
🎸 Music Practice
Slow down to 0.5x to learn difficult passages note by note
🏃 Workout & Fitness
Speed up to 1.5x to create high-energy workout BGM
🎬 Video Editing
Adjust music tempo to perfectly match video length and pacing
📚 Language Learning
Slow down audio lessons for better comprehension, or speed up for efficiency
Frequently Asked Questions
Does speed changing affect audio quality?
Our tool uses advanced time-stretching algorithms that maintain good audio quality when adjusting speed within the 0.5x-2x range, without the "chipmunk" effect of simple playback acceleration.
Can I download the speed-changed file?
The current online tool is for playback preview only. To download speed-adjusted audio, we recommend using the AI Music Generator to create music, then adjust speed and download from your library.
What audio formats are supported?
The online tool supports all common audio formats: MP3, WAV, OGG, M4A, FLAC, etc. The browser handles format conversion automatically.
Why recommend using AI-generated music?
AI-generated music is 100% original with no copyright restrictions, perfect for commercial projects. You can specify BPM when generating or adjust speed anytime after, then download - much more flexible and convenient.