AC3 to WAV Converter

When you need AC3 to WAV

AC3 is the Dolby Digital format of audio tracks from DVDs and video files. When you need to actually work with such a track - cut it in a video editor, clean up noise in an audio editor, align a dub, or mark up lines for subtitles - uncompressed WAV is the most convenient format. Many editing and audio processing apps either do not accept .ac3 at all or handle it unreliably: the track will not sit on the timeline, sync drifts, the waveform fails to render. WAV opens in any audio software and behaves predictably.

What changes after conversion

You get the same track in WAV: the audio is unpacked without additional compression, so the conversion itself takes nothing away from the quality. Be aware of one thing: WAV will not make the sound better than it was in the AC3 - the original track was already compressed when the movie was made, and unpacking simply captures it as is. From that point on, though, you can run as many operations on the file as you like - cutting, joining, processing - without piling up losses from repeated re-encoding.

An important note on size: WAV stores audio uncompressed, so the file will be several times larger than the source. For an hour-long track this is the normal price of editing convenience. If you only need the track for listening, WAV is overkill - a compact MP3 is the better fit.

When this is especially useful

• A movie track is needed on a video editor's timeline, but the editor does not accept .ac3.
• The sound needs cleanup or volume leveling in an audio editor before use.
• A dub or voice-over translation has to be synchronized with the video using the waveform.
• Lines are being marked up for subtitles, and you need a format that lets you jump around the recording easily.
• Fragments of the track will go into a new project, and you want to avoid stacking losses at every step.

Common tasks and search situations

• ac3 track will not sit on the video editor timeline;
• audio editor will not open a .ac3 file;
• unpack a movie track into uncompressed audio;
• align a dub with the video using the waveform;
• marking up subtitle timings from the audio track;
• clean up noise in a track taken from a movie;
• audio for a video project without quality loss during editing;
• decode ac3 to wav for processing.

What to check before converting

1. Open the source file in a player and make sure the track is intact: if it was damaged when extracted from the movie, conversion will not fix it.
2. Check your free disk space: WAV takes several times more room than AC3 of the same length.
3. If the track is multichannel 5.1, consider what your software expects: during conversion the channels are mixed down to stereo, which is enough for most editing tasks.

Format and conversion limits

Converting to WAV adds no losses, but it also does not bring back what was cut away when the track was originally compressed into AC3. If compression artifacts were audible in the original, they will remain in the WAV. A multichannel track is mixed down to stereo - the six separate channels are not preserved in the result. And the main point about size: WAV is large, and keeping a listening library in it is impractical. It is a working format for editing and processing, not for storing a collection.

Related tasks

If the track is meant for listening on a phone, in a player, or in the car, choose AC3 to MP3 - the file will be several times smaller, with no practical difference for everyday listening.

If you are tidying up an archive of AIFF recordings from Apple computers, AIFF to FLAC compresses them without quality loss.