aifc

.aifcAudio Interchange File Format Compressed

Apple Inc. · 1991

Developer
Apple Inc.
Category
Audio
MIME Type
audio/x-aiff
First Released
1991
Open Format
Yes
File Signature
FORM (4 bytes) followed by chunk size (4 bytes) and then 'AIFF' or 'AIFC' (4 bytes)
At a Glance
.aifc
Audio Interchange File Format Compressed

AIFC is a compressed audio file format, often used on Apple systems, that balances audio quality with smaller file sizes.

Reviewed on June 13, 2026
Compression
Compressed (often ADPCM)
Transparency
No
Editability
Medium
Best for
compressed audio

Key Features

  • Supports audio compression (e.g., ADPCM) for smaller file sizes.
  • Based on the flexible IFF (Interchange File Format) structure.
  • Retains metadata like sample rate, bit depth, and channel count.
  • Good compatibility within the Apple ecosystem.

Best For

  • Reducing file size for audio playback and storage on macOS.
  • Applications requiring a balance between audio fidelity and space efficiency.
  • Sound libraries where many small, high-quality audio clips are needed.

Less Ideal For

  • Achieving the absolute highest fidelity audio (lossless formats like WAV or AIFF are better).
  • Maximum compatibility across all operating systems and devices without conversion.
  • Extremely long-form audio content where storage is not a primary concern.
  • Uncompressed audio editing where every detail needs to be preserved.

Common Use Cases

  • Storing and distributing compressed audio samples.
  • Used in professional audio workstations for sound effects and voiceovers.
  • Archiving audio where file size is a consideration.
  • Sound design for games and multimedia applications.

How to Open It

  1. On macOS, QuickTime Player, Music, and GarageBand can open AIFC files directly.
  2. Windows users can often open them with Windows Media Player or VLC Media Player.
  3. Professional Digital Audio Workstations (DAWs) like Adobe Audition, Audacity, and Logic Pro support AIFC.
  4. Use online file converters if your default media player doesn't support it.

What is a .aifc file?

AIFC is a compressed audio file format, a variation of the AIFF (Audio Interchange File Format). It was developed by Apple and is commonly used on macOS and other Apple systems. This format allows for a significant reduction in file size compared to its uncompressed counterpart, making it more efficient for storage and transmission without a substantial loss in audio quality, depending on the compression method used. It's a versatile format suitable for a wide range of audio applications.

Programs That Open .aifc Files

PlatformProgram
WindowsVLC Media PlayerFree
AudacityFree
Adobe AuditionPaid
macOSQuickTime PlayerFreeOfficial
MusicFreeOfficial
GarageBandFreeOfficial
Logic ProPaidOfficial
LinuxVLC Media PlayerFree
AudacityFree
AndroidVLC for AndroidFree
ệt Audio PlayerFree
iOSVLC for MobileFree
Voice Record ProFree
Web BrowserOnline Audio Converters (e.g., CloudConvert, Zamzar)Free

How to Convert .aifc Files

FormatMethod
.WAVAudacity, VLC Media Player, Online Converters
.MP3Audacity, VLC Media Player, Online Converters

Common Problems with .aifc Files

⚠️ File won't play in a specific application.
Ensure the application supports compressed AIFF formats or try converting the file to a more common format like WAV or MP3 using a tool like Audacity.
⚠️ Unexpectedly low audio quality.
The compression used (e.g., ADPCM) might be too aggressive for the source audio, or the file might have been re-compressed multiple times. Consider using an uncompressed format for critical applications.

Frequently Asked Questions

What's the difference between AIFC and AIFF?

AIFF is an uncompressed audio format, while AIFC is a compressed version of AIFF, resulting in smaller file sizes but potentially a slight reduction in audio fidelity depending on the codec used.

Is AIFC a lossless format?

It can be, depending on the codec used. However, common AIFC files often use lossy compression like ADPCM, making them not strictly lossless.

Why use AIFC over MP3?

AIFC generally offers better audio quality at similar file sizes compared to older MP3 compression methods, and it's native to Apple systems. However, MP3 has broader compatibility across devices.

Technical Details

AIFC is a container format that can store audio data compressed using various codecs, most notably the Adaptive Differential Pulse-Code Modulation (ADPCM) codec, although other AIFF-compatible codecs can also be used. It follows the IFF (Interchange File Format) structure, allowing for metadata and different data chunks within the file. The inclusion of compression makes AIFC files generally smaller than standard AIFF files.

Did You Know?

AIFC files can be up to 50% smaller than their AIFF counterparts.
The 'C' in AIFC originally stood for 'Commodore,' though it was later reinterpreted to mean 'Compressed'.

Security Information

AIFC files, like other audio formats, are generally safe and do not pose a security risk on their own. However, always ensure you download files from trusted sources to avoid potential malware embedded within file archives or malicious links.

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