Change Audio Playback Speed Online — 0.5x to 4x

Why Change Audio Playback Speed?

Changing the playback speed of audio has many practical and creative applications. Speed up a long lecture or podcast to save time. Slow down a fast guitar solo to learn every note. Adjust the tempo of a backing track for practice. Our Speed Changer tool processes the audio and exports a new file at the chosen speed — no need to change playback speed settings every time you listen.

Speed Up Audio (Faster Than Normal)

• Podcast listening — Listen to a 1-hour podcast in 40 minutes at 1.5x speed. Most speech remains perfectly intelligible up to 2x speed.
• Lecture study — Speed through recorded lectures at 1.5x or 2x to review material more efficiently.
• Audiobook fast listening — Some listeners prefer 1.25x or 1.5x for audiobooks after getting used to the speed.
• Video content creation — Speed up background audio to fit a shorter video duration.

Slow Down Audio (Slower Than Normal)

• Music transcription — Slow down a fast passage to 0.5x or 0.75x to identify every note.
• Ear training — Study chord changes and melodic movements in complex music at reduced speed.
• Language learning — Slow down native-speed speech to catch every word and pronunciation detail.
• Audio analysis — Slow down a short sound effect to analyse its character and components.

Pitch During Speed Changes

By default, our tool changes speed using time-stretching, which keeps the pitch at the original level. However you can optionally enable pitch-linked mode, where speed changes also affect pitch like a traditional record player — faster speed raises pitch, slower speed lowers pitch.

Supported Speed Range

Speeds from 0.5x (half speed) to 4x (four times speed) are supported. For speech, 0.75x to 2x produces natural results. Beyond 2x, speech may become harder to follow. Beyond 0.5x, audio may sound unnatural or robotic depending on the content and algorithm.