- 1Choose file
- 2Adjust
- 3Download
Change M4A Speed online, free
Speed up or slow down audio recordings (0.5× to 2.5×) and adjust playback pitch.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- WAV
- MP3
- OGG
- AAC
- FLAC
- M4A
How to use Audio Speed & Pitch Changer · Audio Speed & Pitch Changer — frequently asked questions
How to use Change M4A Speed
- 1
Add your M4A file
The picker on this page only accepts M4A files.
- 2
Adjust the settings
The settings start at the Audio Speed & Pitch Changer defaults, ready for M4A input.
- 3
Run the tool
Press start. Processing happens on your device.
- 4
Save the result
The result is delivered as WAV.
What Audio Speed & Pitch Changer can do
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
Audio Speed & Pitch Changer — frequently asked questions
What is M4A?
AAC audio in an MP4 container — used by iTunes, Apple Music and voice memos.
Does Audio Speed & Pitch Changer work with other formats?
Yes. The main tool also accepts WAV, MP3, OGG, AAC, FLAC, M4A.
Is my file uploaded?
No. On the web this tool runs in your browser, so your file is not uploaded.
Are there limits?
It takes one input per run. Server jobs accept up to 0 GB. A job can run for up to 120 seconds. In the browser, the practical limit is your device's memory.
Is Audio Speed & Pitch Changer really free?
Yes. The speed and pitch modifier is 100% free with no registration, subscription fees, or audio length limits.
Can I change audio speed without altering the musical pitch?
Yes. When "Preserve Pitch" is enabled, our time-stretching algorithm speeds up or slows down playback (from 0.5× half-speed to 2.5× fast) while keeping the original musical pitch intact.
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