Change Audio Speed — Speed Up or Slow Down
Speed up or slow down audio playback.
Drag & drop files here
or click to browse · .mp3, .wav, .aac, .flac, .ogg, .wma, .m4a, .opus
About Change Audio Speed
Adjust the playback speed of your audio files from 0.25x (quarter speed) to 3x (triple speed). CocoConvert uses FFmpeg's atempo filter chain, which adjusts tempo while preserving pitch — voices don't become chipmunk-high or demon-low.
Speed up lectures and audiobooks for faster learning (1.5x-2x is popular). Slow down music to practice difficult passages (0.5x-0.75x). Create double-time or half-time effects for music production. The pitch-preserving algorithm chains multiple atempo filters for extreme speed changes.
Supports all major audio formats: MP3, WAV, AAC, FLAC, OGG, WMA, M4A, and Opus. The output retains the input format.
Processing is fast — even for hour-long files. Runs on dedicated servers in Germany with 60-minute auto-deletion.
Supported Formats
How to Use
Upload your audio file
Drag and drop your MP3, WAV, FLAC, or other audio file.
Select playback speed
Choose from 0.25x to 3x. Popular options: 1.5x for lectures, 0.75x for music practice.
Click "Change Audio Speed"
CocoConvert adjusts the tempo while preserving the original pitch.
Download the adjusted audio
Your speed-adjusted audio is ready. Pitch is preserved.
Frequently Asked Questions
Does changing speed affect pitch?
No. CocoConvert uses a pitch-preserving tempo algorithm. Voices and instruments maintain their natural pitch at any speed.
What speed settings are available?
0.25x (very slow), 0.5x, 0.75x, 1.25x, 1.5x, 1.75x, 2x, and 3x. These cover virtually all use cases from music practice to lecture consumption.
Can I speed up long audiobook files?
Yes. The algorithm efficiently handles files of any length. Hour-long files process in seconds on our dedicated servers.