3G2 to AIFF Converter

3G2 to AIFF Converter

3G2 (3GPP2) is the multimedia container old CDMA-network phones — Verizon, Sprint, and similar carriers — used to record and send video and voice clips. AIFF is Apple's uncompressed PCM audio format. This converter pulls the audio track out of a 3G2 file and writes it as AIFF, discarding the picture. Two honest things to know up front: a 3G2's audio is usually a CDMA speech codec (built for phone calls, not music), and even when it holds AAC it is already lossy — so the AIFF will be a much larger file with no fidelity regained. This page explains both formats and what to realistically expect.

3G2 Format at a Glance

AIFF Format at a Glance

What to Expect From the Audio

The crucial fact about 3G2 is its codec set. Where a GSM-era 3GP file leans on AMR, a 3G2 file's audio is typically one of Qualcomm's CDMA speech codecs — EVRC, EVRC-B, EVRC-WB, 13K (QCELP), SMV, or VMR-WB. EVRC and 13K (QCELP) are narrowband speech codecs: EVRC samples at 8000 Hz and runs around 8.55 kbit/s at full rate, carrying roughly the telephone speech band. They were designed to squeeze a voice call into minimal CDMA bandwidth, not to record music.

That sets a hard ceiling on what the AIFF can sound like. AIFF stores the decoded samples losslessly, but it cannot reconstruct frequencies the codec never captured — a narrowband voice memo becomes a faithful, telephone-sounding PCM file, not a hi-fi one. And even when a 3G2 carries AAC (more common on camcorder-style clips), AAC is already lossy: the AIFF holds the AAC-decoded samples uncompressed, so you get a much larger file with no audible improvement. Convert to AIFF for the workflow — raw PCM your Mac DAW opens natively — not to upgrade quality the phone never recorded.

How to Convert 3G2 to AIFF

1. Upload Your 3G2 File: Drag and drop your .3g2 clip onto the page or click "+ Add Files." The tool also accepts .3gp, and you can queue several files at once. Uploads run over an encrypted connection and are processed on our servers.
2. Set Audio Channel: Leave it on "Original" to match the source, or pick "Mono" for a voice memo — most CDMA-phone speech is already a single channel, so Mono keeps the AIFF smaller with no loss.
3. Set Audio Sample Rate (Optional): Leave it on "Original." If the source is EVRC or QCELP speech it was captured at 8000 Hz; raising it to 44100 Hz only inflates the file without adding detail the codec never recorded. Use "Trim" if you want only part of the clip.
4. Convert and Download: Click "Convert" and save your AIFF. The output is uncompressed PCM 16-bit big-endian. No sign-up, no watermark.

Frequently Asked Questions

Will converting my 3G2 to AIFF make the audio sound better?

No. AIFF is an uncompressed container, not a quality upscaler. Most 3G2 clips hold EVRC or 13K (QCELP) narrowband speech captured at 8000 Hz, so the AIFF stores those same band-limited samples as PCM — it still sounds like a phone recording, just in a file roughly 100x larger than the compressed original. If the 3G2 holds AAC, the AIFF carries the AAC-decoded samples with no audible improvement. AIFF's value is workflow (native PCM in your DAW with no re-decode), not fidelity.

What audio codec is inside a typical 3G2, and why does it matter?

3G2 was built for CDMA2000 networks, so its audio is usually a Qualcomm CDMA speech codec — EVRC, EVRC-B, EVRC-WB, 13K (QCELP), SMV, or VMR-WB — rather than the AMR codec you'd find in a GSM-era 3GP. The narrowband variants (EVRC, QCELP) are tuned for voice at around 8 kHz, which is why extracted speech sounds telephone-like. Camcorder-style 3G2 clips may instead carry AAC, which decodes to music-grade PCM.

What bit depth and byte order does the AIFF output use?

The output is PCM 16-bit big-endian (PCM_S16BE) — the historical AIFF encoding that Logic Pro, GarageBand, and Pro Tools assume. Big-endian byte order is the original AIFF convention, inherited from Apple's Motorola/PowerPC era. There's no benefit to a wider bit depth here: a 3G2's audio is lossy and often only 8 kHz, so 16-bit already exceeds the source's effective resolution. If you need a different PCM width or little-endian samples, convert to 3G2 to WAV, which exposes more PCM options.

My 3G2 has EVRC speech — what sample rate should I choose?

Leave Audio Sample Rate on "Original." EVRC and QCELP record at 8000 Hz, so an 8 kHz mono AIFF preserves everything the phone captured at roughly 0.9 MB per minute. Upsampling to 44100 Hz produces a file about 5x larger that contains no extra audio information — the codec filters out everything above the telephone speech band at the source, and resampling cannot invent frequencies that were never recorded.

Is the 3G2 (3GPP2) format still produced by current devices?

Rarely. 3G2 belongs to the CDMA2000 era, and the underlying networks have been retired — Verizon shut down its 3G CDMA network on December 31, 2022, the last major US carrier to do so. The 3GPP2 file-format specification (C.S0050) has seen revisions, but most 3G2 files you encounter today are archived recordings from older Verizon, Sprint, or similar CDMA-network phones, which is exactly the case this extraction is for.

What's the difference between AIFF and AIF?

None — .aiff and .aif are the same Audio Interchange File Format, just a 4-character versus 3-character extension, and they play identically in every DAW. Both are uncompressed PCM in big-endian byte order, the format Apple defined in 1988 on the EA IFF 85 structure.

I only need a small, shareable file — is AIFF the right target?

No. Uncompressed PCM is the opposite of small, so a one-minute clip balloons to several megabytes. AIFF makes sense only when a Mac or pro-audio tool wants raw PCM. For a compact file that plays anywhere, convert to 3G2 to MP3 instead. To trim or cut the extracted audio after conversion, run the AIFF through Audio Cutter.

How long do you keep my uploaded file?

Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — there's no account, no watermark, and the audio is never shared or made public. In our testing, a 30-second EVRC voice clip (8 kHz mono) produced an AIFF of about 0.5 MB, while the same length of stereo AAC audio at 44.1 kHz produced roughly 5 MB.