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AIFF vsM4A: Key Differences & Best Format for You

Compare the features of AIFF and M4A file formats to choose the best option for your needs.

Basic Information

AIFFM4A
CategoryThe general type of file (audio, image, etc.).
audioaudio
CompressionMethod used to reduce file size (Lossy, Lossless, Uncompressed).
UncompressedLossy
Relative SizeTypical file size compared to other formats.
LargeSmall
MIME TypesCommon MIME types associated with the format.
  • audio/x-aiff
  • audio/aiff
  • audio/mp4
  • audio/x-m4a
Open FormatIs the format specification publicly available and free to use?
NoNo

Technical Details

AIFFM4A
Bit DepthNumber of bits used to represent color or audio sample amplitude (higher means more detail).
3216
ResolutionImage dimensions (pixels) or audio sample rate/video dimensions.
--
Max QualityHighest achievable quality level or characteristic.
Studio quality (depends on source)Variable (depends on codec - AAC or ALAC)
Encoding MethodSpecific algorithm or standard used for encoding the data.
Pulse-Code Modulation (PCM)AAC (default) or ALAC
Max File Size LimitAny known maximum file size limitations.
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Features & Usage

AIFFM4A
CompatibilitySoftware, devices, or platforms that support the format.
  • macOS
  • Windows
  • Professional DAWs (Logic Pro, Pro Tools)
  • Apple devices (iTunes, iPod, iPhone)
  • Android
  • Windows
  • macOS
  • Web Browsers
Use CasesCommon applications and scenarios where the format is used.
  • Professional audio recording
  • Mastering
  • Archiving
  • Music downloads (iTunes Store)
  • Mobile audio
  • Podcasts
Metadata SupportCan the format store additional information (tags, descriptions, etc.)?
YesYes
Transparency SupportDoes the format support transparent backgrounds (for images)?
--
Editing FriendlyIs the format suitable for easy editing without significant quality loss?
YesNo
Encryption SupportDoes the format support password protection or encryption?
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Pros & Cons

AIFFM4A
ProsAdvantages and strengths of the format.
  • Lossless audio quality
  • High fidelity
  • Standard for professional audio recording
  • Good compression efficiency (often better than MP3)
  • Supports metadata
  • Can contain lossless audio (ALAC)
ConsDisadvantages and weaknesses of the format.
  • Very large file sizes
  • Not suitable for streaming or web use
  • Primarily associated with Apple ecosystem
  • Less universally supported than MP3