Speed up or slow down audio files in bulk for learning or practice
Listening to a one-hour lecture in thirty minutes, or slowing a guitar solo down to learn it note by note, both come down to the same control. Meicut's audio speed changer retimes any audio file from 0.25x to 100x, with a live preview so you can hear the exact speed before processing, and it handles whole batches at once.
Upload your audio, choose a preset or drag the slider, check the duration estimate, and start. Batch processing works with a free account; a single file needs no sign-up.
- Speed range from 0.25x slow motion to 100x time-lapse
- Ten one-tap presets from 0.25x to 100x plus a fine slider and exact input
- Live preview plays the audio at the selected speed
- Duration estimate shows the new length before you start
- Batch processing retimes a whole queue with one setting
- Works with MP3, WAV, OGG, M4A, AAC, FLAC and WMA
Why people change audio speed
Listen to podcasts and lectures faster
Most spoken content stays clear at 1.5x or 2x, which turns an hour-long episode into a commute-sized listen. The duration estimate shows exactly how much time you get back.
Slow down music to practice it
At 0.75x or 0.5x, fast solos and dense passages slow down enough to pick apart note by note. Nudge the slider until the part sits at the edge of what you can play along with.
Retime a whole course or series at once
Queue every episode of a lecture series, set the speed once, and each file comes out at the same pace. Useful when a playlist needs to fit a fixed amount of time.
Make slow-motion or chipmunk-style audio
Extreme settings are creative tools: 0.25x drags any sound into a dramatic crawl, and very high speeds turn speech into cartoon chatter for skits and memes.
Sync audio to a fixed slot
When a voiceover must match a video segment or a presentation timer, type the exact multiplier into the input and the estimate confirms the final length down to the second.
Presets or the slider
One-tap presets
The common speeds are one click away: 0.5x and 0.75x for practice, 1.5x and 2x for faster listening. Best when you already know the number you want.
Slider and exact input
Drag the slider to explore by ear, or type a precise value with one decimal when audio has to hit a specific duration.
Frequently Asked Questions
How do I speed up an audio file?
Upload your audio and choose a speed above 1x, such as 1.5x or 2x for podcasts and lectures, then start processing and download the result. You can speed up several files at once with the same setting.
Can I slow down music to practice along with it?
Yes. Choose a speed below 1x, such as 0.75x or 0.5x, to slow a song down so you can hear every note while you practice.
Does changing speed distort the sound?
Moderate speed changes stay clear and natural. Extreme settings will naturally sound more processed, so start with a moderate speed if you are unsure.
Can I change the speed of several files at once?
Yes. Add multiple files, set the speed once, and every file is processed with the same multiplier. Batch processing works with a free account; a single file needs no sign-up.
Can I set an exact speed like 1.3x?
Yes. Besides the presets, you can drag the slider or type any value between 0.25x and 100x with one decimal place.
What happens to my uploaded audio?
Files are uploaded for processing, then expire and are deleted according to your account rules.