What Is Lossless Audio? | The Truth About Sound Quality

For the full breakdown, see our best Earbuds For Lossless Audio guide.

Most people stream music that is missing a surprising amount of its original information. Standard formats like MP3 and AAC drastically shrink file sizes by permanently deleting audio data the encoder considers less important. Lossless audio turns that trade-off on its head, giving you the full recording without the bloat. Here is exactly how it works, where you can stream it, and what gear you actually need to hear the difference.

How Lossless Audio Actually Works

Lossless compression removes statistical redundancy rather than audible information. Think of it like a zip file for a document: the file gets smaller for storage and transfer, but when you open it, every word and letter is restored exactly as it was written. The most common formats are FLAC and Apple’s ALAC, alongside uncompressed WAV.

The standard baseline for lossless is CD quality: 16-bit depth with a 44.1 kHz sample rate. Higher-resolution tiers go up to 24-bit and 192 kHz, though the audible benefit of those upper ranges depends heavily on your listening setup. The key principle is that nothing is thrown away, so what reaches your ears or DAC is mathematically identical to the master recording.

Lossless vs. Hi-Res: What’s the Difference?

These two terms are often used interchangeably, but they are not the same. Lossless simply means no data was destroyed. Hi-res lossless means the recording exceeds the CD-quality baseline. Apple Music, for example, lists standard Lossless at 24-bit/48 kHz and Hi-Res Lossless at 24-bit/192 kHz. A standard lossless stream at 16-bit/44.1 kHz is genuine lossless audio, even though it is not hi-res.

The real-world distinction matters most when shopping for hardware. Standard lossless runs comfortably through a good wired DAC and pair of headphones. Hi-res lossless demands a cleaner signal chain and higher-quality gear to avoid audible distortion at the high end.

How to Stream Lossless Audio on Apple Music and Spotify

Getting lossless audio on your phone does not require new equipment at the subscription level. Apple Music includes lossless in its standard plan. To turn it on, go to Settings > Music > Audio Quality and enable Lossless Audio (requires iOS/iPadOS 14.6 or later).

One important catch: Bluetooth headphones cannot carry true lossless audio at full quality. Both Apple and Spotify’s own guidance points to wired connections for an uncompromised lossless feed. If you are shopping for new gear to pair with a lossless subscription, upgrading to a capable wired set is the most logical step. We have tested the best earbuds for lossless audio to help you choose a model that can actually resolve the extra detail this format delivers.

Common Misconceptions About Lossless Audio

• Lossless sounds louder. It does not. The format preserves data, not volume. Services still apply loudness normalization across all tracks, so switching to lossless on its own will not boost your volume.
• Bluetooth is fine for lossless. Standard Bluetooth codecs like AAC and SBC are lossy. Even advanced codecs compress the signal before transmission. For true lossless playback, a wired connection to a DAC or a compatible device is still required.
• Higher bitrate always means lossless. A file can be high-bitrate but still lossy. Bitrate alone tells you nothing about whether data has been discarded. Lossless is defined by the format, not the bitrate.

The honest truth is that lossless audio matters most when your full signal chain—source file, playback app, DAC, headphones, and room acoustics—can resolve the extra information. If you listen through standard earbuds in a noisy environment, the upgrade may be subtle. For anyone building a serious listening setup, however, it remains the only format that guarantees you are hearing exactly what the artist and engineer intended.