Converting M4A to WAV for editing, the right way

M4A is a container, usually holding AAC compressed audio, sometimes Apple Lossless. It is what iPhones, many field recorder apps and a lot of cameras produce. Editing software can often read it, but timeline performance, plugin behaviour and delivery specs all favour uncompressed WAV.

Decoding is not restoration

Converting AAC to WAV gives you an uncompressed file, not the quality of an original uncompressed recording. What the encoder discarded stays discarded. The point of the conversion is a stable, sample-accurate file your tools can scrub, process and export without decoding on every playback.

Choose the right sample rate and bit depth

• Keep the source sample rate when possible. A 44.1 kHz voice memo does not become better at 96 kHz.
• For film work, 48 kHz is the house standard; resample only once, at the start.
• 24 bit gives you headroom for processing. 16 bit is fine for a finished reference.

Watch the channel count

Phone recordings are frequently dual mono, meaning two identical channels. Importing that as stereo wastes a track and can cause phase confusion if one side is later processed. Check the file first and export true mono when both sides are identical.

Convert locally

Interviews, casting tapes and voice memos are often confidential. Browser-based conversion decodes the M4A on your own machine, so no upload happens and no copy sits on someone else's server.