Advanced Audio Coding

Writable

audio

Audio compression format from MPEG

Identify it

Extensions	`.3gp.aac.m4a.m4b.m4p.mp4`
MIME types	`audio/aacaudio/aacpaudio/mp4aaudio/mp4a-latmaudio/mpeg4-genericaudio/mpgaaudio/x-aacaudio/x-m4aaudio/x-m4baudio/x-m4paudio/x-mp4a-latm`
Wikidata	`Q337594`
Library of Congress	`fdd000114fdd000233`

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Open it

A Better CD EncoderOpen sourcewrites · Artistic License 1.0 / GNU General Public License, version 2.0 or later
FAACOpen sourcewrites · GNU Lesser General Public License, version 2.1 or later / GNU Library General Public License, version 2.0
FFmpegOpen sourcereads and writes · LGPL-2.1-or-later / GPL-2.0-or-later
Q191782Open sourcereads and writes · GNU General Public License, version 3.0
SoXOpen sourcereads and writes · GNU General Public License
OpenH264Open sourcereads and writes · 2-clause BSD License
EasyTAGOpen sourcereads · GNU General Public License, version 2.0 or later
ElisaOpen sourcereads · GNU Lesser General Public License, version 3.0
Ex FalsoOpen sourcereads · GNU General Public License
FlowplayerOpen sourcereads · GNU General Public License
KodiOpen sourcereads · GNU General Public License, version 2.0
PhotoRecOpen sourcereads · GNU General Public License
Q117725Open sourcereads · GNU General Public License, version 2.0
Q141674392Open sourcereads · Apache Software License 2.0 / MIT License
Q1576579Open sourcereads · GNU General Public License, version 2.0 or later
EZ CD Audio Converterreads and writes
GarageBandreads and writes
Adobe After Effectsreads · proprietary license
Audify Music Playerreads · proprietary license
CoffeeCup MP3 Rip and Burnreads
Freemake Video Converterreads · freeware
Media Player (Windows 11)reads
MediaHuman Audio Converterreads · freeware
Mp3tagreads · free license
Nintendo 3DS Soundreads
Photorecoveryreads
Pinnacle Studio 17 Ultimatereads
Q1063722reads · freeware
Q300915reads · freeware
Quick Lookreads
SHOUTcastreads · freeware
VideoStudio X7reads
Xilisoft Video Converter 3reads
MicroDicomreads · proprietary license

Convert it

To	With	Fidelity	Command and losses
FLAC (Free Lossless Audio Codec) 1.2.1	FFmpeg	Lossless	`ffmpeg -i in.aac out.flac` Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.
Waveform Audio	FFmpeg	Lossless	`ffmpeg -i in.aac out.wav` Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.
Matroska 1-4	FFmpeg	Lossy	`ffmpeg -i in.aac out.mkv` Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
MPEG 1/2 Audio Layer 3	FFmpeg	Lossy	`ffmpeg -i in.aac out.mp3` Lossy re-encoding.
MPEG-4 Part 14	FFmpeg	Lossy	`ffmpeg -i in.aac out.mp4` Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
Ogg	FFmpeg	Lossy	`ffmpeg -i in.aac out.ogg` Lossy re-encoding.
WebM	FFmpeg	Lossy	`ffmpeg -i in.aac out.webm` Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.

Sources

Wikidata Q337594

From Converters (FFmpeg, ImageMagick, Pandoc, LibreOffice), Wikidata. Updated 2026-10-20.

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