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M4A to PCM - Online Audio Converter
Convert M4A to PCM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert M4A to PCM
Drop M4A audio here or click to select
M4A
PCM (PCM 16-bit)
About M4A to PCM
Convert M4A to PCM. M4A is the MPEG-4 audio container usually holding AAC or ALAC. PCM is raw pulse-code samples with no container or headers. Sample rate and width must be set by hand since headers carry none..
Why convert M4A to PCM?
- Larger files than lossy shares with PCM uncompressed quality.
- Keep quality where supported.
- Private, no upload - runs in your browser.
M4A vs PCM
| Codec | AAC | PCM 16-bit |
|---|---|---|
| Compression | lossy | uncompressed |
| Sample behavior | Quality set by bitrate | Full quality kept |
| Typical use | M4A is the MPEG-4 audio container usually holding AAC or ALAC. | PCM is raw pulse-code samples with no container or headers. |
When not to convert M4A to PCM
- Skip PCM for the smallest share: lossless output stays large, so prefer a lossy target when sending M4A files.
- Keep a master copy: repeated exports stack small losses, so archive M4A before batch PCM shares.
Limits
Starting point: M4A - M4A is the MPEG-4 audio container usually holding AAC or ALAC. Check whether the track is AAC or ALAC before picking settings. Sample rate and width must be set by hand since headers carry none. Encode PCM (PCM 16-bit) from M4A at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert M4A to PCM?
Drop your M4A file onto this page, choose quality and codec settings, then click Convert. The result downloads as PCM instantly. All processing runs in your browser.
What codec is used for PCM?
The default codec for PCM is PCM 16-bit. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.