3GPP to AIFF Converter

Extract 3GPP Audio to AIFF: What This Tutorial Covers

This walkthrough is for anyone holding a 3GPP mobile clip — a phone recording, a voice memo, an old MMS attachment — who needs the audio track pulled out and saved as AIFF, Apple's uncompressed PCM format, for a Mac or pro-audio workflow. By the end you will know which two settings actually matter, how to predict the output size before you click Convert, and the one thing AIFF categorically cannot do: add fidelity the phone never captured.

How to Convert 3GPP to AIFF

1. Upload Your 3GPP File: Drag and drop or click "+ Add Files" to add your .3gpp clip. Several files can be queued and they all run with the same settings, so a folder of voice memos converts in one pass.
2. Set Audio Channel: The dropdown starts at ORIGINAL, which matches whatever the source holds. Pick Mono for speech recordings — most 3GPP phone audio is already a single channel, so Mono keeps the AIFF at half the size with nothing lost.
3. Set Audio Sample Rate: Leave this at ORIGINAL. If the source is AMR-NB speech it was captured at 8,000 Hz; resampling up to 44,100 Hz multiplies the file size by more than five without adding one hertz of real detail.
4. Convert and Download: Click Convert and save the .aiff. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

What Is Actually Inside Your 3GPP File

3GPP (.3gpp, also written .3gp) is a container defined by the 3rd Generation Partnership Project in specification TS 26.244 and built on MPEG-4 Part 12, the ISO base media file format — the same skeleton as MP4. The audio riding inside it is one of a small, predictable set of codecs, and which one you have decides everything about the AIFF you get back.

If the clip came off a feature phone or is a call/voice recording, it is almost certainly AMR-NB. If it came off a later handset that also shot H.264 video, AAC-LC is the likely payload.

Walk-through: Choosing Audio Channel and Sample Rate

Only two controls change the result here, and the right answer depends entirely on which row of the table above you are in.

• Voice memo or call recording (AMR-NB): Set Audio Channel to Mono and leave Audio Sample Rate at ORIGINAL. AMR-NB is 8 kHz mono by design, so anything else is wasted bytes. You get a small, bit-faithful PCM copy of the speech.
• Mobile music or a clip with AAC stereo audio: Leave both at ORIGINAL. The channel layout and the 44,100 Hz rate then track the source exactly, preserving the full stereo image the AAC encoder captured.
• Unsure what is inside: Leave both at ORIGINAL. Matching the source is always safe — you never discard information, and the AIFF is exactly as detailed as the original allowed.
• Your DAW session runs at a fixed rate: Only then is it worth forcing 44,100 or 48,000 Hz, and do it for session-conform reasons, not because you expect it to sound better. It will not.

There is no bit-depth control to worry about: the converter always writes PCM_S16BE, 16-bit big-endian samples, which is the canonical AIFF encoding that Logic Pro, GarageBand, and Pro Tools assume. Going wider than 16 bits would gain nothing, because a lossy 8 kHz source has far less effective resolution than 16 bits already provides.

How Big Will the AIFF Be?

AIFF stores raw PCM, so the size is pure arithmetic — sample rate × 2 bytes per sample × channel count. Nothing about the content changes it, which means you can predict the output before uploading.

This is why an AIFF is routinely many times larger than the 3GPP it came from: the 3GPP stored the audio compressed at kilobits per second, and AIFF stores it uncompressed at hundreds of kilobytes per second.

Common Errors and How to Fix Them

• "The AIFF still sounds like a phone call." The source was AMR-NB — 8 kHz, mono, filtered to telephone bandwidth. AIFF stores those exact band-limited samples as PCM; it cannot reconstruct frequencies the codec discarded at capture. No setting fixes this; the ceiling is the original recording.
• "My AIFF is enormous compared to the 3GPP." Expected, and the size table above explains it exactly. Keep Sample Rate at ORIGINAL and choose Mono for speech to stay on the smallest row available to you.
• "There is no audio in the output." The .3gpp may be a video-only clip with no audio track at all, or a truncated download. Confirm the original actually plays sound in VLC or QuickTime before converting.
• "I wanted the video as well." This tool is audio-only; the picture is discarded by design. To keep the moving image, use 3GPP to MP4 instead.
• "My file is named .3gp, not .3gpp." Same format, different spelling of the extension. Use 3GP to AIFF and every instruction on this page still applies.

When This Doesn't Work

AIFF is the wrong destination when your goal is a small, shareable file — uncompressed PCM is the opposite of small, and a few minutes of stereo audio runs to tens of megabytes. For sending or archiving cheaply, 3GPP to MP3 gives a compact lossy file instead. If a Windows-side tool chokes on big-endian samples, 3GPP to WAV writes the same PCM data little-endian in a RIFF container. And if the .3gpp is DRM-protected or only partially downloaded, no online converter can read it — that is a problem with the source file, not with the format you picked.

Frequently Asked Questions

Will converting my 3GPP to AIFF make the audio sound better?

No. AIFF is an uncompressed container, not an upscaler. If the 3GPP holds AMR-NB audio it was captured at 8 kHz and filtered to roughly 200–3,400 Hz, so the AIFF holds those same band-limited samples in PCM form — same phone-recording character, much larger file. If the 3GPP holds AAC, the AIFF carries the decoded AAC samples with no audible change. AIFF's value here is workflow (native PCM your DAW can edit without re-decoding), not fidelity.

My 3GPP has AMR-NB speech — what sample rate should I choose?

Leave Audio Sample Rate at ORIGINAL. AMR-NB is recorded at 8,000 Hz, so an 8 kHz mono AIFF preserves everything that was captured at about 0.96 MB per minute. Resampling to 44,100 Hz produces a file more than five times larger that contains no extra audio information: AMR-NB filters out everything above roughly 3,400 Hz at the encoder, and resampling cannot invent frequencies that were never recorded.

Why is my AIFF so much larger than the original 3GPP?

Because 3GPP stores audio compressed and AIFF stores it raw. AMR-NB often sits near 12 kbit/s and AAC around 64–128 kbit/s, while 16-bit PCM runs at 16,000 bytes per second for 8 kHz mono and 176,400 bytes per second for 44.1 kHz stereo. The video track is discarded, but the audio payload expands by one to two orders of magnitude. Keeping Sample Rate at ORIGINAL and choosing Mono for speech keeps the output as small as the format allows.

What audio codec and bit depth does this output?

PCM_S16BE — 16-bit big-endian linear PCM, the standard AIFF sample encoding. Big-endian byte order is a legacy of AIFF's origins on the 68000-based Macintosh, and it is what Logic Pro, GarageBand, and Pro Tools expect from a .aiff. There is no bit-depth selector on this page because a wider depth would add bytes without adding information to a lossy mobile source. If you specifically need little-endian PCM or other bit depths, use 3GPP to WAV.

How is AIFF different from WAV if both are uncompressed?

They store the same thing — linear PCM — in different chunked containers. AIFF was released by Apple in 1988 and derives from Electronic Arts' Interchange File Format, storing samples big-endian; WAV is Microsoft's RIFF-based equivalent and stores them little-endian. At the same sample rate, bit depth, and channel count the actual audio is identical. Pick AIFF when your tools are Apple-centric, WAV when they are not; there is no quality difference between the two.

Can I extract just part of the clip instead of the whole thing?

Yes. Open Advanced Options and use the Trim control, which starts at Unchanged. Set a start point and a duration to convert only that span, which is the most effective way to keep an uncompressed AIFF manageable — halving the duration halves the file, exactly, because PCM size scales linearly with time.

Does the AIFF keep any of the metadata or timestamps from my phone clip?

Do not count on it. A 3GPP file carries MPEG-4 style metadata boxes — creation time, recording device, sometimes GPS — that have no direct equivalent in AIFF's chunk structure, and the conversion is a decode-and-rewrite of the audio samples, not a metadata migration. If the capture date matters, note it from the file's properties before converting, or keep the original .3gpp alongside the AIFF.

How big will my specific file be, and how are my uploads handled?

Our converter writes PCM_S16BE at whatever sample rate and channel count you select, so the size is fully predictable rather than something you have to test: 30 seconds of 8 kHz mono lands at 480,000 bytes, and 30 seconds of 44.1 kHz stereo at 5,292,000 bytes — multiply the bytes-per-second column in the table above by your clip length. On privacy: files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours, with no sign-up, no watermark, and no sharing or public listing of your audio.