audio tools
Change Audio Speed Online
Speed up long podcasts and lectures for faster listening, or slow down music tracks to learn instruments without altering the natural voice pitch.
Processed 100% locally in browser memory.
Upload Audio to Change Speed or Tempo
Speed up or slow down audio playback from 0.5x to 2.0x in real-time.
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How to Use Audio Speed Changer
1
Upload Audio
Select your sound track.
2
Select Speed Multiplier
Choose 0.5x, 0.75x, 1.25x, 1.5x, or 2.0x speed.
3
Download
Export the modified tempo track.
About Audio Speed Changer
Uses phase vocoder and granular time-stretching algorithms to alter playback duration without modifying original harmonic pitch frequencies.
Supported Formats
MP3WAVM4AOGG
Operational Limits
- •Extremely slow speeds (<0.5x) may exhibit minor time-stretching artifacts
Key Features
- 0.5x to 2.0x continuous speed control
- Independent pitch-lock algorithm
- Instant playback test
- Lossless WAV/MP3 export
Frequently Asked Questions
No. With Pitch Lock enabled, voice timber remains natural even at 2.0x speed.
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