AVCHD to AIFF Converter

AIFF or WAV — Which Should You Extract AVCHD Audio To?

Pulling the soundtrack off a camcorder clip is easy; picking the target trips people up, because AIFF and WAV hold byte-for-byte identical audio and differ only in wrapper and ecosystem. The short answer: extract to AIFF when the file is heading into Logic Pro, GarageBand, Final Cut, or any Mac-only session, and to WAV when Windows tools, hardware players, or 24-bit mastering are involved. This page does the AIFF side — the video is discarded and the audio track is decoded to uncompressed big-endian PCM.

AIFF vs WAV, Side by Side

Both formats record chunk sizes in 32-bit fields, so neither is a good home for a multi-hour single recording; split long captures rather than fighting the ceiling.

When to Pick AIFF

• Your session lives in Logic Pro, GarageBand, or Final Cut, where AIFF is the house format and imports without conversion.
• You are handing files to a Mac-based editor and want metadata that Apple's tools read natively.
• The clip is going into a sample library or scratch track and 16-bit is plenty.

When to Pick WAV Instead

• Windows or Linux tools are anywhere in the chain, or the file needs to play on hardware.
• You want 24-bit or 32-bit depth for heavy processing — AVCHD to WAV exposes those depths, and this AIFF page does not.
• You are archiving for an unknown future toolchain, where the more universally read container wins.

What Your Camcorder Actually Recorded

AVCHD was introduced by Sony and Panasonic in 2006 and pairs H.264/AVC video with one of those two audio tracks inside an MPEG transport stream. The clips land on the card as .MTS files under the camera's PRIVATE/AVCHD structure and are usually renamed .m2ts once imported, which is why all three extensions describe the same recording.

How to Convert AVCHD to AIFF

1. Upload Your AVCHD File: Drag and drop the .mts, .m2ts, or .avchd clip onto the page or click "+ Add Files". Several clips can be queued and extracted with the same settings.
2. Set Audio Channel: Leave it on ORIGINAL to keep the recorded layout, choose Stereo to fold a 5.1 camcorder track down to two channels, or Mono to halve the size of a voice-only recording.
3. Set Audio Sample Rate and Trim: Audio Sample Rate also defaults to ORIGINAL — camcorders record 48 kHz, so leaving it alone avoids a pointless resample; pick 44100 HZ only if you are mastering for CD. Switch Trim from Unchanged and enter a Start time and Duration to export one segment.
4. Convert and Download: Click Convert and download the AIFF. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours later. No sign-up, no watermark.

Frequently Asked Questions

Does converting AVCHD audio to AIFF improve the quality?

No, and it cannot. AIFF is an uncompressed container, but it can only hold what the source already carried. If the camcorder recorded Dolby AC-3 — the default on most consumer models — the AIFF preserves that decoded audio exactly while restoring nothing AC-3 discarded at capture. The real win is workflow: no repeated decode in Logic or Pro Tools, and no further generation loss as you edit.

What audio codec does AVCHD actually use?

One of two. Dolby Digital (AC-3) runs from 64 to 640 kbit/s across 1 to 5.1 channels and is what consumer camcorders write so the footage stays Blu-ray compatible. Linear PCM, uncompressed and up to roughly 1.5 Mbit/s for stereo, appears on professional bodies. Either way the video beside it is H.264/AVC in an MPEG transport stream.

Which PCM formats can I choose for the AIFF?

We checked the option list on this page directly: Audio Codec offers PCM 16-bit Big Endian (the default and the classic AIFF flavour), PCM 16-bit Little Endian, plus A-law and mu-law for compact speech. There is no 24-bit AIFF option here, so if a mastering chain demands 24-bit, extract to WAV instead, which exposes 24- and 32-bit depths at identical audio quality.

Why is my AIFF so much larger than the original clip?

Because uncompressed PCM's size depends only on sample rate, bit depth, and channel count — never on how busy the audio is. At the 48 kHz 16-bit stereo AVCHD records, that is 1,536 kbit/s, about 11.5 MB per minute or 691 MB per hour. The original .mts is smaller because its audio was compressed and, more to the point, because you have thrown away the video.

Does this preserve 5.1 surround?

Only if you leave Audio Channel on ORIGINAL and your downstream tool reads multichannel AIFF. Choosing Stereo or Mono is a downmix: the discrete surround channels are combined, not retained. If you would rather keep the surround layout in the format the camcorder used, convert to Dolby Digital with AVCHD to AC3 instead of an uncompressed target.

Will an AIFF play on Windows?

Usually, yes — Microsoft's own list of file types supported by Windows Media Player includes Audio Interchange File Format (.aif, .aifc, .aiff). The friction shows up further out: some hardware players, car head units, and mobile apps never learned AIFF, while VLC, Audacity, foobar2000, and Reaper open it anywhere. When Windows software or hardware is the primary destination rather than a Mac session, AVCHD to WAV is the safer container at identical audio quality.

My extracted audio is silent — what went wrong?

Check the source first: some AVCHD clips carry dialogue on a channel a player ignores, and partially copied cards produce clips whose audio stream is unreadable even when the picture scrubs. Keep Audio Channel on ORIGINAL for the first attempt, and if a multichannel track still plays silent downstream, fold it to Stereo so everything lands in the front two channels.

Can I extract just one part of a long clip?

Yes. Switch Trim from Unchanged, set Start time and Duration in seconds or HH:MM:SS.sss, and only that range is decoded — much faster than exporting an hour of PCM and cutting it afterwards. If you have already made the AIFF, the audio cutter trims it without a re-encode of the rest of your workflow.

Is .avchd the same as .mts and .m2ts?

They are the same recordings. AVCHD is the format; .MTS is what the camcorder writes to the card under its PRIVATE/AVCHD folder structure, and .m2ts is the usual name after import. The extraction is identical whichever extension your files carry, and MTS to AIFF is the same tool for clips that kept the camera's naming.

How are my uploaded files handled?

They travel over an encrypted connection, are processed on our servers, and are deleted automatically a few hours after conversion — never shared, published, or watermarked, and no account is required. Multi-gigabyte camcorder recordings are fine; upload size and connection speed are the practical limits.