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How to get the most out of your FLAC files

What’s so special about the free lossless audio codec?
July 13, 2021

You’ve probably noticed that a lot of upselling goes on in consumer audio. For your listening setup, you might be tempted by more “premium” headphones and speakers, added features like surround sound, outboard amplifiers, fancy cables. The upgrade cycle seemingly never ends. One area you may have considered upgrading is the audio files themselves.

There’s been a big industry push recently touting the benefits of high-res, high-bitrate files that are apparently superior to regular old MP3s and similar traditional lossy streaming formats. And of course, there’s a cost for this apparent enhancement to your listening pleasure. Is this a genuinely worthwhile upgrade, or are we being sold a bill of goods?

Editor’s note: this article was updated on July 12, 2021, to reword some sections and add a contents menu.

What is FLAC and why should you care?

A picture of the Samsung Galaxy Note 9 against a geometric blue object.
Android Authority The Samsung Galaxy Note 9 supports FLAC files, along with any Android device running Android 3.1 or later.

FLAC stands for Free Lossless Audio Codec, and it’s a digital audio file format like MP3, but with a major, important difference: it is a lossless file type—meaning that no audio data is discarded during the encoding process. This results in significantly larger files than MP3, but you can rest assured that there’s no detail missing from the files you’re hearing. Audio purists are drawn to FLAC because it leaves the recording untouched. Additionally, FLAC supports a range of bit depths and sampling rates that go high enough to satisfy all your hi-res desires.

This all sounds great if you’re not put off by the large file sizes which will impact your storage and/or wireless data usage. But is FLAC a straight-up win, regardless of what you’re listening on and where? Actually, no. Time to get down to it and learn how to get the most out of those FLAC files, and when and where it actually makes sense.

Does your device support FLAC files?

A photo of a man holding the Apple iPhone SE, with the screen on.
Good news: your iPhone will playback FLAC files.

All Android smartphones and tablets support FLAC audio playback so long as they run on Android 3.1 or later. Unless you’re using a technological dinosaur, chances are your smartphone will support FLAC files. Since iOS 11, iPhones have supported FLAC playback; previously it only supported ALAC, Apple’s proprietary lossless codec. For anyone using an iPhone 5S or newer, you’ll be able to use FLAC files without converting them to ALAC or playing through a third-party app.

The playback device itself isn’t likely to be an issue, but the thing you need to be aware of is that if you’re connecting wirelessly via Bluetooth to your speaker(s), receiver, or headphones, your lossless FLAC files won’t be lossless anymore because Bluetooth uses codecs of its own, and none of them are lossless—no, not even LDAC.

Consider if FLAC makes sense for your use case

A picture of the Plantronics BackBeat Fit 3200 true wireless workout earbuds worn by a woman on a bike in profile.
FLAC files aren’t always appropriate or worth it, since they require so much storage space. If you’re working out, a regular MP3 will be just fine.

So there’s very little point in listening to lossless files over a Bluetooth link, which means you should only consider a wired connection for it to make sense. Another consideration, particularly if you spend a lot of time listening on headphones outside of your home is background noise.

When loud external noises (e.g., passing cars) permeate the physical barrier of our earphones, our brains raise the alarms and focus on the loud, threatening sound over the quieter music. It’s not that your music decreases in loudness anytime a train or car breezes by, it’s that our brains have shifted focus as a means of survival. Brilliant job, evolution, but not the best for enjoying music.

External noise is going to make it a lot less likely you'll appreciate lossless files.

How does this translate to degrading sound quality? If you’re likely to encounter a lot of outside noise while you’re listening to your files, that’s going to make it a lot less likely that you’re going to notice or appreciate any difference at all between lossless and lossy file formats. In general, it doesn’t make a lot of sense to take your uncompressed audiophile listening experience out on the streets or in the gym—you’ll be better off with the more efficient, smaller files offered by lossy encoders in those situations.

Do you need certain hardware for FLAC files?

Getting the most out of premium audio isn’t the most budget-friendly endeavor. Those gas station earbuds you picked up last week? Yeah, they won’t be doing you any favors here; each piece in the hi-res audio machine matters. This doesn’t mean you have to get the most expensive headset your credit limit allows, nor should you, but it does mean you should feel comfortable throwing down more than $50 on headphones. Keeping the points we already raised in mind, your best option is going to be a pair of wired over-ears, preferably of the open-back variety (read more about the differences between these and closed-back designs) or a good pair of wired in-ear monitor style headphones.

Why good headphones matter with FLAC

A close-up image of the Philips Fidelio X2 open-back, over-ear headphones grill in profile.
The Philips Fidelio X2 headphones are a relatively affordable way to step up your at-home audio setup.

If you want to appreciate all of the untouched low-level details living in your FLAC files, then you need headphones that can reproduce them accurately. There’s no need to go overboard on spending, as there’s a point of diminishing returns, but you bet your bottom dollar the Sennheiser HD 598 SE sounds better than the JBL Live 650BTNC. If you’re looking for a realistic sense of 3D space, you should focus on open-back headphones. You don’t have to go crazy; even the $99 Grado SR80e will do wonders for a high-resolution file.

This is a double-edged sword, however; once you get a good pair of headphones, you may start to notice imperfections in older lossy audio files—a headset that accurately reproduces detail with clarity makes high-quality files sound great and low-quality files sound less so. Plus, just because an audio file is lossless, that doesn’t guarantee the recording, mixing, and mastering will be top-notch.

Do you need a DAC for FLAC?

External digital-to-analog converters (DACs) are rarely ever a necessity if you’re working with modern hardware. Consumer electronics have largely advanced from the days of poor quality internal DACs, and the integrated hardware found in your smartphone is well equipped for high-bitrate playback.

Drop O2 + SDAC lifestyle product image on black table.
Drop The Massdrop x O2 SDAC is an excellent choice for listeners in need of a DAC.

The only reason you need to get a standalone DAC, is if your source device introduces noise, or if it’s unable to output files at their native specs. FLAC comes in a variety of flavors ranging up to 32 bits and a multitude of sample rates. The fact of the matter is that you’re unlikely to need a DAC for consumer FLAC files like those from Bandcamp, Qobuz, Tidal, Deezer. In general, you’re going to want to use the money you’d spend on a DAC on storage instead.

Related: Best headphone amps

Now, another question often fielded to us is, “Do I need an amp?” There’s no reason to overcomplicate this: if you can get your music up to a pleasurable level with volume to spare with your existing setup, you don’t need an amp. On the off chance that you’re unable to reach a comfortable volume, a headphone amplifier may be in the cards for you. If that’s the case, please direct your attention to our headphone amp guide.

How do you get a proper fit with headphones?

An angled, aerial photo of the Massdrop x Noble Kaiser 10 Universal Pelican carrying case open to reveal all included ear tips, an ear tip cleaner, and drawstring carrying pouch.
Higher-quality earphones usually include more ear tips options than cheap earbuds.

When you’re using headphones, the sound you’ll hear is only as good as the seal you achieve. In short, if your headphones don’t fit properly, you won’t hear all that high-res audio files afford. Take a few minutes to find a proper fit. For over-ear headphones, this means adjusting the headband and yoke until a seal is formed around the ear. Anyone using earbuds should experiment with the provided ear tips for a cogent seal. If none of the supplied options work, you may need to look into third-party options. Regardless of what variety of headset you prefer, optimal audio quality will only be achieved with an appropriate fit.

Can you be a budget audiophile?

A woman holding a Google Pixel 3 with the Tidal HiFi app, which supports FLAC, pulled up.
Lily Katz / SoundGuys
Although Tidal HiFi is relatively expensive, it saves you a lot of money if you often buy FLAC albums.

Those doing mental math may be a bit overwhelmed by the costs you’re about to incur to get on the lossless train. As someone who prides herself on her frugality, I’m happy to share basic workarounds to costly headphones. Sure, $100-plus is pretty reasonable in the grand scheme of audio gear, but it’s more than a drop in the bucket for many of us. An easy way to save money is to buy used or refurbished products, especially on name brands like Sennheiser or Audio-Technica. Not only does this lessen the cost to you, but it also reduces waste and resource scouringwhich is neat, too.

Let’s say you’re not particularly picky about your music. Well, there are great options out there with low-cost or even free FLAC albums. Bandcamp is a great resource as many lesser-known artists will make their albums available as hi-res downloads for free. If you’re able, you should support the artist, but this remains a legal avenue for audiophiles to get their free kicks.

Alternatively, those who frequently purchase lossless albums may find a subscription to Amazon Music HD or Qobuz Studio Premier worth it. For $12.99/mo (Prime members) or $12.49/mo, respectively, you’re afforded access to thousands of high-resolution files at any time. That means by streaming just one or two albums a month means you’ll break even. The drawback to these services is that you don’t own the content once you end your subscription, but some may easily reconcile with this.

While I certainly appreciate lossless audio formats and take the time to enjoy them from my home, it’s fine to forgo FLAC files. They’re more cumbersome and costly than MP3s. Plus, not everyone cares for high-fidelity audio, and that’s okay—enjoy your music how you want not how someone tells you it should be enjoyed. This article is just a simple reminder of things to keep in mind for FLAC fans, whether you’re just starting your hi-res audio endeavors or consider yourself a lossless audio veteran.