AAC to M4A
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Input Format
What is AAC?
AAC (Advanced Audio Coding) is a modern lossy audio codec that delivers better quality than MP3 at the same bitrate. The .aac extension is common in streaming, mobile devices, and video containers.
History
AAC was standardized by the MPEG group in the late 1990s as the successor to MP3 and became the default codec for many platforms.
How it works
AAC uses advanced psychoacoustic models and flexible block sizes to compress audio efficiently while preserving clarity at lower bitrates.
How to open AAC files
AAC plays on most modern devices and media players:
- Apple Music or iTunes
- VLC Media Player
- Windows Media Player
- Android music players
- Foobar2000
- Audacity
- Most smartphones and tablets
Tips for working with AAC files
AAC is a strong choice for streaming and portable audio:
- Use AAC for better quality at low bitrates
- Store AAC in M4A for metadata support
- Avoid re-encoding from AAC to AAC
- Convert to MP3 for older devices
- Keep a lossless master for archiving
Useful links
More about AAC and modern audio coding:
- MPEG AAC overview
- AAC vs MP3 comparison
- Streaming audio best practices
Output Format
What is M4A?
M4A is an audio-only file container based on MPEG-4. The .m4a extension typically stores AAC or ALAC audio and is widely used by Apple devices and streaming services.
History
M4A became popular with the rise of iTunes and iPod devices in the early 2000s, offering better quality than MP3 at similar bitrates.
How it works
M4A uses the MPEG-4 container to hold audio streams, most commonly AAC for lossy compression or ALAC for lossless audio.
How to open M4A files
M4A files are supported on many platforms and apps:
- Apple Music or iTunes
- VLC Media Player
- Windows Media Player
- QuickTime Player
- Android music players
- Audacity
- Most smartphones and tablets
Tips for working with M4A files
Use M4A for efficient, high-quality audio delivery:
- AAC in M4A offers excellent quality at low bitrates
- Use ALAC for lossless archiving
- Convert to MP3 for maximum compatibility
- Keep metadata updated for library management
- Avoid re-encoding to prevent quality loss
Useful links
Learn more about M4A and AAC:
- MPEG-4 audio overview
- AAC vs MP3 comparison
- ALAC lossless audio guide
Why Choose Our Converter?
Free
IloveMP4 is free to use and allows you to convert your video file easily
Fast
With IloveMP4, you can convert your file really fast!
Secure
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Quality
IloveMP4 always offers the best quality conversion.
Frequently Asked Questions
File Size & Length
Maximum file size?
Up to 4GB for free users. For larger files, use our video compressor or upgrade.
Maximum video length?
No length restrictions - convert videos of any duration.
Conversion Options
Change format?
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Change frame rate?
Use our FPS changer or compressor.