FLAC, ALAC, WavPack, APE: Which One Should You Use?

Why sound quality is not worth comparing

Lossless compression works like ZIP for documents. When unpacked, the result is exactly the original — not a single bit differs.

That means FLAC, ALAC, WavPack, and APE made from the same source produce identical waveforms on playback. If someone tells you one of them "sounds warmer", that is technically impossible — what differs is probably the player, not the format.

So the question is not "which sounds best" but "which causes the least trouble".

FLAC — the sensible default

FLAC is the most widely supported lossless format in the world. Open, free, and supported by nearly every music player, Android phone, dedicated digital audio player, and desktop application.

Its compression typically produces files around 50–60% of the original WAV size. Not the smallest, but good enough.

Its biggest advantage is not technical: because it is so widely used, the chance that FLAC will still open twenty years from now is very high. For a library you intend to keep for life, that matters more than a few percent of file size.

ALAC — if you live in Apple's world

ALAC (Apple Lossless) used to be closed, but Apple opened it in 2011. It is now widely supported too, though still not as widely as FLAC.

The reason to use it is specific: if you play music through an iPhone, iPad, or Apple Music on a Mac, ALAC works without extra software. FLAC has been supported on iOS for several years, but its integration with the built-in music library is still less smooth.

File sizes are roughly comparable to FLAC, sometimes slightly larger.

WavPack — flexible, but lonely

WavPack has one capability the others lack: hybrid mode. It can split a file into two parts — a small lossy file that plays on its own, plus a correction file that restores it to lossless when combined.

Useful if you want a light version on your phone and the full version at home. But honestly, that need is rare, and storage is cheap now.

Device support is far narrower than FLAC. Use it if you genuinely need hybrid mode; otherwise FLAC is safer.

APE (Monkey's Audio) — smallest files, hidden costs

APE usually produces the smallest files of the four, often 2–5% smaller than FLAC at high compression settings.

But there are two prices to pay. First, decoding is far heavier — portable players drain their batteries faster, and some devices cannot play it at all.

Second, support is the narrowest. APE is almost absent outside Windows, and many modern players do not include it.

A 3% size difference is not worth the risk of your library being unopenable on your next device.

Quick comparison

• Widest support: FLAC, by a long way
• Best for Apple devices: ALAC
• Smallest files: APE, at the cost of processing and support
• Most flexible: WavPack, for very specific needs
• Safest long term: FLAC

Practical advice

For almost everyone: use FLAC. If every device you own is made by Apple and you do not plan to switch, ALAC is fine too.

More important than which format you pick is being consistent. A library that is entirely FLAC is far easier to manage than one mixing four formats, because every tool, every player, and every migration becomes simpler.

And if your library is already mixed? No need to panic. Converting between lossless formats is safe — since no information is lost, you can turn APE into FLAC with no quality reduction whatsoever.