Trim AIFC

How to Trim AIFC Audio

1. Upload your AIFC file — Click "+ Add Files" or drag and drop your AIFC (compressed AIFF) audio file.
2. Set trim points — Under "Trim," enter a start time and duration.
3. Adjust compression (optional) — Under "File Compression," select "Quality Preset" (Highest to Lowest) or "Constant Bitrate" for fixed bitrate output.
4. Set audio channel (optional) — Under "Audio Channel," choose mono or stereo.
5. Set sample rate (optional) — Under "Audio Sample Rate," select the output sample rate.
6. Trim and download — Click "Trim" and download your trimmed AIFC file.

Why Trim AIFC Files?

AIFC (AIFF-C) is the compressed variant of Apple's AIFF format. While standard AIFF stores uncompressed PCM audio, AIFC supports various compression codecs — including MACE, IMA ADPCM, and others used in classic Mac OS applications. AIFC files are found in legacy Mac audio archives, older multimedia projects, and scientific data recordings.

Trimming AIFC files lets you extract specific segments from these legacy recordings without converting to another format.

AIFC vs AIFF vs AIF

Format	Extension	Compression	Use Case
AIFF	.aiff	Uncompressed PCM	Studio production
AIF	.aif	Uncompressed PCM	Same as AIFF (short ext)
AIFC	.aifc	Compressed (MACE, IMA)	Legacy Mac, smaller files

Frequently Asked Questions

What is AIFC format?

AIFC (AIFF-C or AIFF Compressed) is the compressed variant of Apple's AIFF audio format. It supports codecs like MACE 3:1, MACE 6:1, and IMA ADPCM for smaller file sizes than uncompressed AIFF.

What compression setting should I use?

"Quality Preset: High" preserves good quality. For voice recordings, "Constant Bitrate" at 128 kbps is sufficient. For music, use 192–256 kbps.

Should I use mono or stereo?

Keep the original channel layout. Mono for voice, stereo for music. Mono halves file size.

Can I change the sample rate?

Yes. Under "Audio Sample Rate," select the output rate. 44100 Hz is standard. Lower rates (22050 Hz) reduce file size for voice content.

Should I trim as AIFC or convert to a modern format?

For modern use, convert to FLAC (lossless) or MP3 (universal). Keep AIFC only for legacy Mac system compatibility.