Audio ToolsLesson 320Free preview
Change Audio Speed
This lesson is part of Web Developer Tools · All levels
Summary
Change audio speed to speed up or slow down audio playback without having to change the duration of the video. If the tempo is changed without pitch adjustment, the sound can be heard higher or lower. Time-stretching techniques such as atempo maintain the basic tone while changing the tempo. In extreme changes, the sound quality can be artificial or rhythmic.
Key points
- Tempo sets the playback speed, pitch sets the pitch
- Time-stretching changes the tempo while maintaining pitch
- Accelerating audio shortened duration, slowing down extended duration
- The atempo filter works best in the medium range
- Extreme changes can cause sound artifacts
Full lesson
Code examples and quizzes
Full lessons, code examples, and quizzes are available to subscribers. 5 questions.