AVCHD to WAV Converter

Extract AVCHD Audio to WAV: What This Tutorial Covers

This walks through pulling the soundtrack out of an AVCHD camcorder clip — the .MTS and .M2TS files Sony, Panasonic, Canon, and JVC cameras write — and decoding it into a plain PCM WAV you can drop straight into a DAW, a video editor, or a transcription tool. AVCHD stores audio as Dolby Digital AC-3 on most consumer bodies, or as Linear PCM on professional ones, and neither travels well outside a video container. By the end you will know which PCM profile to choose, what the file will weigh, and why a WAV of a two-hour recording can hit a hard wall.

How to Convert AVCHD to WAV

1. Upload Your AVCHD File: Drag the .MTS or .M2TS clip onto the page, or click "+ Add Files" to browse into the camera's STREAM folder. Several clips can be queued and they share the same settings.
2. Choose a PCM Profile Under Audio Codec: Output starts on PCM 16-bit Little Endian, the universally accepted WAV flavour. PCM 24-bit and PCM 32-bit Little Endian are there for sources that were recorded as Linear PCM, and PCM A-law / PCM mu-law for 8-bit telephony-style output.
3. Set Audio Channel, Sample Rate, and Trim (Optional): Audio Channel offers Original, Mono, or Stereo; Audio Sample Rate offers Original or a fixed rate from 8000 Hz up to 48000 Hz. Leave both on Original to avoid a needless resample. Switch Trim from Unchanged to set a Start time and Duration and export only a segment.
4. Convert and Download: Click Convert and save the WAV. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public.

Walk-through: Choosing the Right PCM Profile

WAV stores raw samples, so the only decision that really shapes the file is how many bits describe each one. Match the profile to how the camera recorded, not to how big you wish the file were.

• Your camcorder recorded Dolby AC-3 — the default on consumer AVCHD models, at anywhere from 64 to 640 kbit/s. The audio was already lossy-compressed at capture, so PCM 16-bit Little Endian is the sensible landing place. Decoding into 24- or 32-bit cannot recover information the AC-3 encoder discarded; it only makes the file half again as large.
• Your camcorder recorded Linear PCM — some professional NXCAM and prosumer bodies do, at around 1.5 Mbit/s for stereo. That source is already uncompressed, so PCM 24-bit Little Endian preserves full resolution for mixing and mastering.
• You are feeding a sampler, a transcription engine, or an old editor — stay on PCM 16-bit Little Endian. It is the most broadly accepted WAV variant in existence, and plenty of tools still refuse anything else.
• Do not reach for A-law or mu-law on music or dialogue you care about. Those are 8-bit companded telephony formats; they exist here for interoperability with voice systems, not for quality work.
• Leave Audio Sample Rate on Original. AVCHD audio is captured at 48 kHz, which is already the standard rate for video post-production — resampling to 44100 Hz just to match a music project adds a conversion step for no benefit.

What a WAV Costs You in Bytes

Uncompressed audio size depends only on sample rate, bit depth, and channel count — never on how loud or busy the recording is. These are the arithmetic figures for a 48 kHz stereo track, the rate AVCHD uses.

AVCHD Audio and the WAV You Get

Common Errors and How to Fix Them

• "The WAV is enormous" — That is the format working as designed. A 48 kHz 16-bit stereo track is about 11.5 MB per minute no matter what is on it. If you need something you can email or archive, convert the audio to a compressed format instead — AVCHD to MP3 for small and universal, or AVCHD to FLAC for lossless at roughly half the size.
• "The WAV stops before the video does" — Very long recordings can run into the 4 GiB ceiling that WAV inherits from RIFF's 32-bit size field, which is about six hours of 48 kHz 16-bit stereo. Use Trim to export the recording in segments, or pick a format without that ceiling.
• "My editor rejects the file" — A few older samplers and voice tools only accept 16-bit PCM. Re-run with Audio Codec set to PCM 16-bit Little Endian rather than 24- or 32-bit.
• "The exported audio is silent" — Check that the clip actually carries a soundtrack; some camera modes and some post-processed exports contain video only. If it does have audio, leave Audio Channel on Original for the first attempt, then try Stereo if a downstream tool still plays nothing.
• "The pitch or speed sounds wrong" — Something resampled. Set Audio Sample Rate back to Original so the WAV keeps the source's 48 kHz timing rather than being forced to a different rate.

When This Doesn't Work

Extracting to WAV changes the container and decodes the audio; it does not restore quality. If the camcorder recorded AC-3, the WAV is a faithful copy of an already-lossy signal, not a recovered master — nothing can rebuild what the encoder threw away at capture. The conversion also cannot help with clips whose audio stream is damaged on the card, or with recordings that were copied off mid-write and truncated. If what you have is a standalone Dolby Digital file rather than a full camcorder clip, AC3 to WAV is the more direct route.

Frequently Asked Questions

Does converting AVCHD to WAV improve the audio quality?

No. WAV is an uncompressed container, but it can only hold what the source already contained. If the camcorder recorded Dolby AC-3 — the default on consumer models — the WAV preserves that audio exactly as decoded, without restoring the frequencies and detail AC-3 removed at capture. What you get is a lossless copy of a lossy original, which is exactly what you want for editing, and not a quality upgrade.

What audio codec does AVCHD actually use?

Either Dolby Digital (AC-3) or Linear PCM. AC-3 is the consumer default and runs from 64 to 640 kbit/s across 1 to 5.1 channels. Linear PCM appears on professional bodies at around 1.5 Mbit/s for stereo, with support for up to 7.1 channels. Both are part of the published AVCHD specification, and both decode cleanly to PCM here.

Why is the WAV larger than the whole video file it came from?

Because the video was compressed and the WAV is not. AVCHD squeezes 1080-line H.264 video and AC-3 audio into 24 Mbit/s or less, while a 48 kHz 16-bit stereo WAV spends a flat 1,536 kbit/s on sound alone with no compression whatsoever. On a short clip the WAV can easily outweigh the source. That trade is deliberate: uncompressed audio is what mixing and mastering tools want to work with.

Should I pick 16-bit, 24-bit, or 32-bit PCM?

Match the source. AC-3 recordings belong at 16-bit — higher depths enlarge the file without adding information that was ever captured. Linear PCM recordings justify 24-bit, which preserves full resolution and gives you headroom for gain changes during a mix. Reach for 32-bit only when a specific tool explicitly asks for high-bit or float input.

Will a 5.1 Dolby track come through as multichannel WAV?

WAV can carry more than two channels, and leaving Audio Channel on Original keeps the source's layout rather than folding it down. That said, plenty of players and editors expect stereo and will handle a multichannel WAV awkwardly or ignore the surround channels. If your destination is a stereo timeline, set Audio Channel to Stereo and let the conversion downmix cleanly rather than leaving the fold-down to whatever software opens the file.

Is there a length limit on the WAV file?

Yes, and it is a property of the format rather than of this tool. WAV stores its size in a 32-bit unsigned field inherited from RIFF, so files must stay under 4 GiB — roughly six hours of 48 kHz 16-bit stereo, or about 6.8 hours at CD-quality 44.1 kHz. Long-form recordings such as lectures, concerts, or all-day event coverage can hit that wall. Split them with Trim, or use a compressed format for the full-length copy.

Can I export only part of the clip instead of the whole track?

Yes. Switch Trim from Unchanged, then set a Start time and a Duration in seconds or as HH:MM:SS.sss. That is the efficient way to lift one line of dialogue, a single take, or a sound effect out of a long recording without exporting the entire soundtrack and cutting it afterwards.

How are my files handled, and how long do you keep them?

Your camcorder clip is uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public. Nothing is retained for indexing, training, or resale, and no account is required to run a conversion.