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How to convert a WavPack (WV) file to FLAC on a Mac

· 6 min read

Converting a WavPack file to FLAC on a Mac is a lossless step: both formats store the exact same audio samples, so nothing in the sound changes, and you end up with a file that plays in far more places than a .wv does. The fastest way is to drag the .wv file onto Manatee, choose Convert, and pick FLAC. This post explains why the conversion is safe, how to do it, and the one situation where a WavPack file hides a catch.

What WavPack and FLAC actually are

WavPack, the format behind the .wv extension, is a lossless audio compressor. Like a ZIP archive for sound, it shrinks the data without discarding any of it, so decoding a WavPack file gives back the original PCM samples exactly. It has been around a long time and is a favorite among people who archive their own recordings and CD rips, partly because it also supports a clever hybrid mode covered below.

FLAC, the Free Lossless Audio Codec, does the same job with different compression math: it packs PCM audio losslessly and then reverses that when you play it. The practical difference between the two is reach. FLAC is understood by a huge range of players, phones, cars, network streamers, and editing apps, while WavPack, though excellent, is recognized by far fewer of them. Converting to FLAC is almost always about compatibility, not quality.

Why lossless to lossless keeps every sample

Some conversions simply move a stream from one container to another without touching it. This is not one of those: WavPack and FLAC compress the audio in different ways, so the file has to be decoded to raw PCM and then compressed again as FLAC. The word “re-encode” makes people nervous, because with lossy formats like MP3 or AAC every re-encode throws away a little more detail.

Here it does not. Both WavPack and FLAC are lossless, so the PCM that comes out of the WavPack decoder is bit-for-bit identical to what goes into the FLAC encoder, and the PCM you get back when you later play the FLAC is identical again. You could prove it by decoding both files to WAV and comparing their checksums; they match. The only things that change are the file size and the wrapper. If you want the fuller picture on why lossless and lossy conversions behave so differently, see lossless-vs-lossy-what-happens-to-audio-when-you-convert-it.

Convert a WavPack file to FLAC on the Mac

An honest note on the built-in tools first: macOS does not play or convert WavPack out of the box. The Music app will not import a .wv file, and Preview and QuickTime do not recognize it, so there is no stock Apple app that does this conversion. You need a tool that carries its own WavPack decoder.

With Manatee the steps are short:

  1. Open Manatee and choose Convert. You can also drag the .wv straight onto the menu bar icon, or right-click the file in Finder and choose Fix with Manatee under the Services menu.
  2. Pick FLAC as the target.
  3. Drop the .wv file into the window, or a whole folder of them. Each one appears in the job list with a progress bar.
  4. The FLAC file is written alongside the original. The .wv is left exactly as it was.

Everything runs on your Mac, nothing is uploaded, and Manatee bundles its own decoding engine, so there is nothing else to install first.

The catch with hybrid WavPack files

WavPack has a hybrid mode that trips people up. In it, a single recording is split into a small lossy .wv file plus an optional .wvc correction file; together they reconstruct the full lossless original, while the .wv alone is a compact lossy preview. If you have both files sitting in the same folder, the complete lossless audio is available and your FLAC will be truly lossless.

If you only have the .wv part of a hybrid pair, with the .wvc missing, then that .wv is lossy on its own, and the FLAC made from it can only be as good as that lossy version. FLAC will faithfully preserve whatever it is handed, but it cannot recreate detail that was never in the file. So before converting a hybrid set, make sure the matching .wvc file is present. For ordinary, non-hybrid WavPack files, which is most of them, there is nothing to worry about: they are fully lossless on their own, and the FLAC will be too.

FLAC also supports embedded tags and cover art, so the target format can hold the artist, album, and artwork you expect. It is worth checking the tags in your player after converting an unusual source, since not every field from every format maps across cleanly.

Questions

Will the FLAC file be smaller than the WavPack?

Usually they are close. Both are lossless and typically squeeze PCM to somewhere around half to two-thirds of the equivalent WAV size, and which one wins by a hair depends on the music. If you need the file genuinely small for a phone or a message, that means stepping down to a lossy format like M4A or MP3 and accepting some loss, which no lossless format can avoid.

Can I convert back to WavPack later without losing anything?

Yes. Because FLAC is lossless, you can decode it and re-encode to WavPack and arrive at the same samples again. Lossless formats can be converted among each other any number of times without degrading the audio.

Does the Music app play the FLAC once I have it?

No. The Music app on macOS does not import FLAC into its library; it handles WAV, AIFF, AAC or M4A, and MP3. If your real goal is the Apple Music app or an iPhone, converting to M4A is the better target. FLAC is the right choice for the many players and devices outside Apple’s own apps.