AC3 to WAV Converter

Convert AC3 to WAV Online

AC-3 (Dolby Digital) is the lossy multichannel codec baked into DVD-Video, ATSC digital TV, and Blu-ray, and it is the audio you most often end up with after demuxing a disc. It plays back beautifully in a home theatre, but many audio editors, DAWs, and older players won't decode it cleanly. Converting to WAV decodes the audio into uncompressed PCM that opens almost anywhere. By default the channel layout is kept as-is — a 5.1 AC-3 track stays six channels in the WAV — and you can fold it down to stereo or mono if you only need a two-channel mix. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.

AC-3 (Dolby Digital) at a Glance

WAV Format at a Glance

How to Convert AC3 to WAV

1. Upload Your AC3 File: Drag and drop your .ac3 file onto the page or click "Add Files" to browse. You can queue several files and convert them with the same settings.
2. Choose the Audio Channel: Leave Audio Channel on Original to keep the source layout (a 5.1 track stays six channels), or pick Stereo to fold it down to a two-channel mix, or Mono for a single channel — useful when your software or device can't handle surround.
3. Pick Bit Depth and Sample Rate (Optional): Use the Audio Codec dropdown for bit depth — PCM 16-bit Little Endian for CD-style output, 24-bit or 32-bit for editing headroom — and set Audio Sample Rate to Original (usually 48 kHz for AC-3) or a fixed rate up to 48000 Hz.
4. Convert and Download: Click "Convert" and save your WAV. No sign-up, no watermark.

Frequently Asked Questions

Does converting a 5.1 AC3 file to WAV keep all six channels?

Yes, if you leave Audio Channel on Original. A 5.1 AC-3 track (left, right, center, two surrounds, plus the LFE subwoofer channel) decodes to a six-channel WAV. Choose Stereo to fold it down to a two-channel mix or Mono for a single channel. Bear in mind that many consumer players and browser tabs only play the first two channels of a multichannel WAV, so if you need everything audible on ordinary playback, a stereo downmix is usually the safer choice.

How do I downmix a 5.1 AC3 to stereo?

Set Audio Channel to Stereo before converting. The decoder combines the six source channels into a standard two-channel mix (the center and surrounds are folded into left and right, and the LFE is dropped or mixed down), which is what most phones, laptops, and editing apps expect. Pick Original only when you specifically need to keep the discrete surround channels for a multichannel project.

Will the WAV sound better than the AC3 since it's uncompressed?

No. AC-3 is a lossy codec, so the Dolby encoder permanently removed some audio data when the file was first made. WAV stores the decoded result without any further loss, but it cannot recover what was already discarded. Think of it as an exact, editable copy of the AC-3 audio rather than an upgrade in fidelity — the value is compatibility and clean editing, not a quality boost.

Why is the WAV file so much larger than the AC3?

WAV holds uncompressed PCM. CD-quality stereo runs about 1,411 kbit/s (roughly 10 MB per minute) versus 192–448 kbit/s for typical AC-3, so the WAV can be several times bigger — often 5–7x for the same clip. A 5.1 source kept at six channels is larger still, roughly three times the size of the same audio as stereo, because every channel is stored sample-for-sample.

Which PCM bit depth should I choose — 16-bit, 24-bit, or 32-bit?

For general playback or burning to CD, PCM 16-bit Little Endian matches the CD-audio standard and keeps files smaller. If you plan to edit, apply effects, or normalize, 24-bit gives extra headroom and is the common choice for production work; 32-bit is mainly for intermediate files inside a DAW. Because AC-3 was decoded from a lossy source, a higher bit depth won't add detail — it only affects processing headroom and file size.

What sample rate does the WAV use?

By default the Audio Sample Rate is Original, which copies the source rate exactly — for AC-3 that is almost always 48 kHz, since DVD and broadcast audio are mastered at 48 kHz. You can force a fixed rate from 8000 Hz up to 48000 Hz, for example 44100 Hz for CD authoring. Resampling above the source rate never adds detail that wasn't there; it only enlarges the file.

My AC3 came from a DVD or VOB — how do I get the audio as WAV?

DVD audio usually arrives either as a standalone .ac3 stream (after demuxing the disc) or still wrapped inside a .vob. If you already have the .ac3, upload it here directly. If the audio is still inside the video, use the VOB to WAV converter to pull the Dolby Digital track out and decode it to PCM in one step, without a separate demux.

Is there a size limit on the WAV file I can create?

The WAV format itself caps a single file at just under 4 GB, because the RIFF header stores the total size in a 32-bit field — that is roughly 6.8 hours of CD-quality stereo, so it rarely bites for a disc soundtrack. For very long recordings, the lossless AC3 to FLAC converter sidesteps the 4 GB ceiling at about half the size. The more realistic limit for you is upload size and time: a long uncompressed file is large to send, so a stereo downmix keeps the transfer manageable.

In your testing, how big is a converted AC3-to-WAV file?

In our testing, a 3-minute stereo AC-3 clip at 192 kbit/s (about 4.3 MB) decoded to a 48 kHz, 16-bit WAV of roughly 35 MB — the expected jump from lossy compression to uncompressed PCM. Keeping a 5.1 source as six discrete channels roughly triples that. If WAV is impractical to share, convert AC3 to MP3 instead, or use WAV to AC3 to go back the other way.