在线变速器

免费音频速度调整工具

加速或减速您的音频文件，同时保持音调。非常适合播客、有声书、讲座和音乐。专业的时间拉伸算法，卓越的质量。

加载音频转换器中...

How to Change Audio Speed

Simple steps to adjust audio speed while preserving pitch

1

Upload Audio File

Drag and drop your audio file or click to browse. Supports MP3, WAV, FLAC, AAC, M4A, OGG, and more formats.

2

Choose Speed Settings

Select from 7 optimized presets or use custom speed control. Toggle pitch preservation and quality mode for best results.

3

Change Speed

Click 'Change Speed' to process your audio. Apply speed adjustments with optional pitch preservation.

4

Download Result

Download your speed-adjusted audio file. All processing happens locally - no uploads required.

Key Features

Everything you need to adjust audio speed perfectly

Pitch Preservation

Maintain the original pitch when changing speed. No chipmunk voices or slow-motion effects unless you want them. Perfect for natural listening.

Wide Speed Range

Adjust speed from 0.25x (quarter speed) to 4.0x (quadruple speed). Perfect for everything from detailed study to quick review.

Quality Algorithms

Choose between fast processing (atempo) or high-quality mode (rubberband) for superior results, especially at extreme speeds.

7 Speed Presets

Quick presets: 0.5x (half), 0.75x (slow), 1.0x (normal), 1.25x (faster), 1.5x (fast), 2.0x (double). Perfect for common use cases.

Privacy First

All speed adjustment happens in your browser using FFmpeg. Your audio files never leave your device. Complete privacy guaranteed.

Batch Processing

Process multiple audio files at once. Perfect for adjusting entire audiobook chapters or podcast series.

Common Use Cases

Podcast Consumption

Speed up podcasts to 1.25x or 1.5x to save time while maintaining clear, natural speech. Perfect for busy schedules and content consumption optimization.

Recommended: 1.25x or 1.5x preset with pitch preservation

Language Learning

Slow down native speaker audio to 0.5x or 0.75x for easier comprehension. Catch every word and improve pronunciation.

Recommended: 0.75x preset with high-quality mode

Video Tutorials

Adjust tutorial speed based on complexity. Slow down for detailed steps, speed up for familiar content.

Recommended: Custom speed with pitch preservation

Music Practice

Slow down music to 0.5x to learn difficult passages. Practice at reduced speed before increasing tempo gradually.

Recommended: 0.5x or 0.75x with high-quality mode

Algorithm Comparison

Standard (atempo)

  • • Fast processing
  • • Good quality
  • • Best for 0.5x-2.0x
  • • Preserves pitch

High Quality (rubberband)

  • • Slower processing
  • • Superior quality
  • • Best for extreme speeds
  • • Preserves pitch

Resampling

  • • Fastest processing
  • • Changes pitch
  • • Natural effect
  • • Creative use

Related Audio Tools

More tools to help you work with audio files

Tempo Changer

Change music tempo without affecting pitch. Perfect for music practice.

Pitch Changer

Change audio pitch without affecting speed. Great for voice transformation.

Audio Converter

Convert between audio formats easily. Supports MP3, WAV, FLAC, and more.

常见问题

变速器和节奏调节器有什么区别？

变速器可以同时更改速度和音调，或在更改速度时保持音调。节奏调节器使用专为音乐优化的专业 Rubberband 算法。播客和语音内容使用变速器，音乐使用节奏调节器。

更改速度时应该保持音调吗？

对于播客、有声书和讲座 - 这使声音保持自然。对于花栗鼠声音或慢动作效果等创意效果则不需要。取决于您的用例。

播客收听的最佳速度是多少？

大多数人喜欢播客使用 1.25x 到 1.5x。从 1.25x 开始，如果舒适则增加。更高的速度（1.75x-2.0x）适用于熟悉的内容或快语速。

我应该使用哪种算法？

速度在 0.5x-2.0x 之间使用标准（atempo）- 它快速且质量好。极端速度或质量至关重要时使用高质量（rubberband）。仅用于创意变调效果时使用重采样。

支持哪些文件格式？

我们支持所有常见音频格式：MP3、WAV、FLAC、AAC、M4A、OGG、WMA、AIFF 等。您还可以从视频文件（MP4、AVI、MOV、MKV）中提取和调整音频速度。

我的文件安全私密吗？

绝对安全！所有速度调整使用 FFmpeg 在您的浏览器本地进行。您的音频文件永远不会离开您的设备或上传到任何服务器。完全隐私保证。