M4A to WAV audio converter
Convert M4A to WAV to get 16-bit PCM for editing or transcription tools; an AAC source grows many times over, an ALAC source roughly doubles.
Audio
Convert audio to WAV
Choose a file, adjust the edit, preview the result, and export it.
Or drop an MP3, WAV, M4A, AAC, FLAC, OGG, Opus, or WebM audio file anywhere on this page.
Worked example
Convert M4A to WAV to get 16-bit PCM for editing or transcription tools; an AAC source grows many times over, an ALAC source roughly doubles.
The M4A container can carry AAC or ALAC. AAC decodes to PCM with its loss already built in, while ALAC decodes to the very samples it was made from, so for ALAC the WAV is a true lossless copy as long as the original was 16-bit and Sample rate is on Keep source. A 24-bit ALAC is reduced to 16-bit.
Size math: 176,400 bytes per second turns a 45-minute interview into about 476 MB of stereo WAV (2,700 s × 176,400), or about 238 MB with Channels set to 1. The same interview as a 128 kbps AAC M4A is about 43 MB, so long files take noticeably more time and memory to convert in the browser.
Scenario: a journalist exports a phone recording to WAV to load into a transcription or noise-reduction tool that wants PCM. Leave Sample rate on Keep source and choose 44100 or 48000 only to match the project, and pick 1 channel for single-voice recordings.
Common mistake: expecting restoration. A WAV made from AAC still contains the noise and band limits of AAC. Check that the file size divided by 176,400 lands within about a percent of the seconds your player shows (use 192,000 for 48 kHz stereo), and that the first seconds sound the same as the M4A.
Input
sample.m4a
Output
sample.wav
Cover art and chapters do not live in a plain WAV, so keep the M4A if they matter.
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How to use M4A to WAV audio converter
- Choose the media file for M4A to WAV audio converter.
- Select the edit, conversion, or timing option and preview the result.
- Render the output and download it when it is ready.
Quick answers
What does M4A to WAV audio converter do?
Convert M4A to WAV to get 16-bit PCM for editing or transcription tools; an AAC source grows many times over, an ALAC source roughly doubles.
How do I use M4A to WAV audio converter?
Choose the media file for M4A to WAV audio converter. Select the edit, conversion, or timing option and preview the result. Render the output and download it when it is ready.
What can I do with the M4A to WAV audio converter result?
The completed media file is available to preview and download; multiple results can be bundled when the tool produces more than one file.
What should I listen for in the exported audio?
Play the beginning, end, and each edited transition in the downloaded file. Check that speech is not cut off, fades sound natural, and louder sections do not distort. Converting a compressed recording to WAV does not restore information already lost. Keep the source and choose an output format accepted by the destination service.