AMR to AIFC Converter

AMR to AIFC Converter

AMR is a narrowband speech codec — the format your phone's voice recorder and old MMS voice clips use. AIFC (AIFF-C) is Apple's audio container that Mac authoring tools like Logic, Final Cut, and older QuickTime workflows expect. This converter re-wraps an .amr recording into an .aifc file so a Mac app that refuses to open AMR can import it. One honest caveat up front: because the AMR source is already 8 kHz mono and lossy, the AIFC output cannot sound better than the original — see the FAQ below.

AMR Format at a Glance

AIFC Format at a Glance

How to Convert AMR to AIFC

1. Upload Your AMR File: Drag and drop your .amr file or click "+ Add Files." You can queue several recordings and convert them with the same settings.
2. Set Audio Sample Rate and Audio Channel (Optional): Leave both at "Original" to keep the recording exactly as captured (8 kHz mono). Upsampling to 44.1 kHz or forcing stereo only inflates the file — it does not add detail that was never recorded.
3. Trim (Optional): Use Trim to clip dead air or isolate the part of the voice memo you need before converting.
4. Convert and Download: Click "Convert" and download your .aifc file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

Frequently Asked Questions

Will converting AMR to AIFC improve the audio quality?

No. The AMR source is already narrowband 8 kHz, mono, and lossy — most of the original sound was discarded when the voice was first recorded. Wrapping it in AIFC (uncompressed PCM) makes a larger file, but upsampling cannot recover frequencies or detail that were never captured. The AIFC is a faithful copy of an already-low-fidelity recording, not a restored one.

Why would I convert AMR to AIFC instead of keeping the AMR?

Compatibility, not quality. Many Apple/Mac authoring tools (Logic Pro, Final Cut, older QuickTime workflows) accept AIFF-family files but not raw AMR. Converting to AIFC gets the voice memo into a format those apps will import. If you just need a small, portable, widely-playable file instead, convert AMR to MP3 makes far more sense.

Should I upsample the AIFC to 44.1 kHz or convert it to stereo?

Generally no. The recording contains only 8 kHz mono telephone-band audio, so 44.1 kHz stereo AIFC stores the same limited content in a much bigger file. Keep "Sample Rate" and "Channel" on "Original" unless a downstream tool specifically demands a fixed rate (for example, a project that requires every clip at 48 kHz).

Is an AIFC file smaller than a WAV?

Not necessarily. AIFC can hold either compressed audio or uncompressed PCM. When this converter outputs uncompressed PCM (the typical default for a faithful copy), the AIFC is roughly the same size as a WAV of the same audio — there is no fixed compression ratio. The size difference between AMR and AIFC comes from AMR being heavily compressed, not from AIFC being efficient.

What's the difference between AIFC and plain AIFF?

AIFF (Apple, 1988) is the original big-endian uncompressed PCM container. AIFF-C (AIFC) is its later extension that adds a "compression type" field, so it can also store codec-compressed audio — while still supporting uncompressed PCM marked as NONE. If your tool only wants classic AIFF, use AMR to AIFF instead.

Can I batch-convert a folder of voice memos?

Yes. Add multiple .amr files in one go and they convert with the same Sample Rate, Channel, and Trim settings. In our testing, leaving every option on "Original" produced AIFC files that played back identical to the source recordings in QuickTime, just larger on disk because the audio is now stored as uncompressed PCM.

Are my uploaded recordings kept private?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. There's no sign-up, no watermark, and files are never shared or made public. For converting other AMR recordings to different formats, see the AMR converter hub.