Lossless audio is a way of compressing a digital audio file that keeps 100 percent of the original recording's data, so what plays back is an exact copy of the source. The trade-off is file size: lossless files are several times larger than the MP3s and AAC files most of us grew up streaming, because those lossy formats shrink a file by permanently throwing away data the encoder decides you won't miss. Lossless throws nothing away.
The term is everywhere now. Apple Music has streamed it since 2021, Spotify finally switched it on for Premium subscribers in September 2025, and every pair of headphones seems to advertise support for it. What most explainers skip is the part that matters if you make things: platforms re-compress everything you upload, so the only quality you actually control is the quality of the file you start with.
This guide covers what lossless audio is, how it differs from lossy, the formats you'll run into, how lossless relates to hi-res audio, where you can stream it, whether you can actually hear the difference, and what all of it means for the music in your own videos and podcasts.
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What Is Lossless Audio?
Lossless audio is a compression method, not a sound. A lossless encoder looks for redundancy in the audio data and stores it more efficiently, the same way a zip file stores a document. When the file plays, the decoder rebuilds every bit of the original. Nothing is approximated and nothing is discarded, which is why the word "lossless" is literal.
One thing worth untangling early: this is data compression, which is about file size. It has nothing to do with the compression in music that mix engineers use to control dynamics. Same word, completely different job. A track can be heavily compressed in the mixing sense and still be delivered as a lossless file, and vice versa.
The useful mental picture is a studio master. When a mix engineer finishes a song, that master is the reference. A lossless file of that master sounds identical to sitting in the control room with the engineer. A lossy file sounds like a good copy of it.
Lossless vs. Lossy Audio: What's the Difference?
Lossless compression is reversible: decode the file and you get the original back, bit for bit. Lossy compression is not. It removes data the encoder judges least audible (very high frequencies, quiet sounds masked by louder ones) and that data is gone for good. Re-encode a lossy file and you compress a copy of a copy, and the damage compounds.
On the lossless side you have FLAC, ALAC, WAV, and AIFF. On the lossy side you have MP3, AAC, and Ogg Vorbis. The baseline everyone measures against is CD quality: 16-bit/44.1 kHz stereo, which works out to roughly 1,411 kbps uncompressed (44,100 samples per second, times 16 bits, times two channels). A 320 kbps MP3 is carrying less than a quarter of that data. It does a good job of hiding what it dropped, but it dropped it.
| Lossless | Lossy | |
|---|---|---|
| What happens to the data | Stored more efficiently, fully rebuilt on playback | Permanently removed to shrink the file |
| Sound versus the master | Identical | Close, with more loss at lower bitrates |
| File size | Large | Small |
| Best for | Archiving, editing, mixing, anything you'll re-export | Final delivery, streaming, storage on a phone |
Neither one is "better" in the abstract. Lossy exists because it solves a real problem, and for casual listening on a phone it solves it well. Lossless exists because some situations can't tolerate the loss, and if you edit audio for a living, you're in most of those situations.
Common Lossless Audio Formats
You'll mostly meet four. Two are compressed lossless, two are uncompressed, and the difference matters more than most explainers let on.
FLAC (Free Lossless Audio Codec)
FLAC is the open, royalty-free lossless format maintained by the FLAC project at Xiph.org. It shrinks files by 30 to 70 percent depending on the material, without discarding a single sample. It's the format most streaming services chose for lossless, and it plays on nearly everything except, historically, Apple devices.
ALAC (Apple Lossless Audio Codec)
ALAC is Apple's answer to FLAC. Same idea, same result (a bit-perfect copy in a smaller file), built to run natively across iPhone, Mac, and Apple Music. If you live in Apple's ecosystem, this is the lossless you're hearing.
WAV and AIFF
WAV and AIFF are lossless too, but they're not compressed at all. They store the raw audio data as-is, which makes them the largest files of the bunch and the most universally compatible. They're what you'll see on session drives, in editing timelines, and in the download folder of any serious music library. Which one belongs in your edit is a separate question, and it's the whole subject of our post on the best audio format for video editing, so this guide won't relitigate it.
Is Lossless Audio the Same as Hi-Res Audio?
No. Lossless describes how a file is compressed. Hi-res describes the resolution of the recording itself. A file can be lossless without being hi-res, and the two get conflated constantly.
Two numbers define resolution. Bit depth is how finely each sample measures loudness (16-bit is CD, 24-bit is the studio standard). Sample rate is how many times per second the audio is measured (44.1 kHz for CDs, 48 kHz for video). Apple Music makes the distinction concrete with two lossless tiers in Apple Music: Lossless goes up to 24-bit/48 kHz, and Hi-Res Lossless goes up to 24-bit/192 kHz. Both are lossless. Only one is hi-res.
If you work in video, the sample rate half of that equation has a practical wrinkle, because video runs at 48 kHz and a lot of music doesn't. We've covered 48kHz vs 44.1kHz sample rates in depth elsewhere; the short version is that mismatched rates cause problems in the timeline, and starting with the right one avoids them.
Where You Can Stream Lossless Audio
Every major music service now streams lossless, and none of the big two charge extra for it. Spotify was the lone holdout. After years of a promised "HiFi" tier that never shipped, Spotify rolled out lossless streaming to Premium subscribers starting September 10, 2025, at no extra cost, streaming up to 24-bit/44.1 kHz FLAC across more than 50 markets through October 2025.
Apple Music has offered ALAC since 2021, also at no extra cost, in the two tiers described above. Amazon Music and TIDAL offer lossless as well.
One honest caveat. Lossless is off by default almost everywhere, because it uses a lot more data. If you've never gone into your settings, you've probably never heard it.
How to Turn On Lossless Audio in Spotify
- Open your profile settings
In the Spotify app, tap your profile icon in the top left, then go to Settings & Privacy.
- Go to Media Quality
Scroll to the Media Quality section, where the streaming and download quality options live.
- Choose where lossless applies
Wi-Fi, cellular, and downloads each have their own quality setting. Pick Lossless for each one you want, and remember that Spotify requires you to enable it separately on every device you use.
- Confirm the Lossless indicator
Play a track. When lossless is active, a Lossless indicator appears in the Now Playing bar.
Can You Actually Hear the Difference?
Sometimes. On standard Bluetooth earbuds in a noisy room, most people cannot reliably tell lossless from a high-bitrate lossy stream, and anyone who tells you otherwise is probably guessing. On wired headphones or decent speakers in a quiet room, an attentive listener can hear it: more air around cymbals and less smear when a mix gets dense. Whether that difference is worth the data is a personal call.
The wireless problem is real, and it's about bandwidth, not marketing. Standard Bluetooth doesn't have the pipe to carry a full lossless stream, so your headphones re-compress the signal on the way in. Spotify says as much in its own guidance: it recommends wired headphones or speakers over Wi-Fi because Bluetooth connections do not carry full lossless audio. You can pay for lossless and stream it to AirPods, and you will still be hearing lossy audio by the time it reaches your ear.
Where the answer stops being "sometimes" is the moment you do anything to the file after downloading it. Trim it or mix it under dialogue, then export it. Every one of those steps re-encodes the audio, and lossy artifacts that were inaudible in a single pass become audible after two or three. That's the argument for lossless that has nothing to do with golden ears.
What Lossless Audio Means for Creators
Here's the part that changes how you should think about all of this: your audience will never hear your file untouched. Every platform re-encodes uploads into its own lossy delivery format. YouTube's recommended upload settings call for AAC-LC or Opus at 48 kHz, with stereo audio at 384 kbps, and playback is lossy no matter what you hand it. Podcast hosts and social platforms do the same in their own ways. The lossless file you upload becomes a lossy stream on the other side.
So why bother? Because generational loss is the thing you control. If you upload a lossless master, the platform's encode is a first-generation copy of a perfect source. If you upload a 320 kbps MP3 you built from other MP3s, the platform is compressing a copy of a copy of a copy, and that stack is what makes music under dialogue sound thin and swishy on someone's phone. Start clean and the platform's compression is the only compression in the chain.
That matters most before you ever hit publish. Editing and mixing are where audio gets re-exported over and over, and lossless source files are what keep that process from degrading the track. It's the same reason session music stems come as WAV files: you're going to cut them up and bounce them out over and over, and the format has to survive that.
This is also where the music library you use stops being an abstraction. Soundstripe downloads come as 24-bit/48 kHz WAV files (uncompressed lossless, already at video's native sample rate) alongside a 320 kbps MP3 for previews and lightweight projects. The WAV is the one you edit with. The MP3 is the one you email. That's the practical difference between licensing music that's built for a timeline and grabbing something off a free site, and it's worth understanding what royalty free music is before you assume the two are interchangeable.
Podcasters get the same benefit in a slightly different shape. Spoken word is forgiving, and nobody's spectrum-analyzing your interview audio. But the music under it, especially a podcast theme song that plays at the top of every episode, is exactly the kind of dense, repeated content where stacked lossy encodes show. Bring the music in lossless and export once.
The bigger picture explains why any of this is worth writing about. Streaming accounted for 82 percent of US recorded music revenue in 2025 ($9.5 billion of $11.5 billion wholesale, according to the RIAA). Nearly all music now reaches listeners through a compressed pipe. Lossless is the industry's attempt to make that pipe carry the master instead of a copy, and as a creator, you decide what goes in the front of it.
Your platform will compress it. Make sure it's compressing something good.
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Frequently asked questions
Lossless audio is a perfect copy of the original recording, so it is objectively higher fidelity than lossy audio. Whether that matters depends on how you listen. Over Bluetooth in a noisy environment, most people cannot hear the difference. On wired headphones in a quiet room, or in any situation where the file will be edited and re-exported, lossless is the better choice.
Yes. Spotify began rolling out Lossless to Premium subscribers on September 10, 2025, at no extra cost, streaming up to 24-bit/44.1 kHz FLAC. It is off by default and has to be enabled per device under Settings and Privacy, then Media Quality.
Standard Bluetooth cannot carry a full lossless stream, because it does not have enough bandwidth. Wireless headphones re-compress the signal before you hear it, which is why Spotify recommends wired headphones or speakers over Wi-Fi for lossless playback. A wired connection is the reliable way to hear lossless as intended.
No. Lossless describes the compression method, meaning no data is discarded. Hi-res describes the resolution of the recording, meaning a higher bit depth and sample rate than CD quality. Apple Music illustrates the difference with two tiers: Lossless up to 24-bit/48 kHz and Hi-Res Lossless up to 24-bit/192 kHz. Both are lossless, but only the second is hi-res.
Yes, for your source files. Platforms like YouTube re-encode every upload into a lossy format, so your audience never hears your file untouched. What you control is the quality going in. Editing and exporting from lossless files means the platform's compression is the only compression in the chain, which is what keeps music under dialogue from sounding thin on a phone.
