What Is Lossless Audio?
Updated October 2026
Lossless audio keeps every part of the original sound. A lossless file can be smaller than WAV when compressed, such as FLAC, and it decodes back to exactly the same sound.
The short version
- Lossless means the decoded sound matches the original exactly.
- WAV is uncompressed and lossless; FLAC is compressed and lossless.
- MP3 is lossy: it removes detail to save space.
- Keep a lossless master for editing and re-exporting.
The short definition
Lossless audio is stored so that the decoded result is identical to the original. Compression can make a lossless file smaller, but nothing is thrown away. WAV and FLAC are the common lossless formats.
Lossless and lossy
A lossy format such as MP3 throws away detail the ear is supposed to miss. Each conversion from a lossy file adds loss. That is why editors keep a lossless master.
What to keep
Keep the WAV or FLAC master. Export a lossy copy only for sharing, from the master, at a high bitrate.
In Tunedzy
The master is kept in a high-precision form for editing, and exports to WAV, FLAC or MP3 come from it. The format guide explains each choice.
Keep the master lossless
Tunedzy keeps a high-precision master and exports WAV, FLAC or MP3 from it, so you never edit a lossy copy.
Free tools for this
Frequently asked questions
Is FLAC lossless?
Yes. It is compressed and lossless.
Is WAV lossless?
Yes. It is uncompressed and lossless.
Can I hear the difference between lossless and high-bitrate MP3?
For speech, most listeners cannot. Check on your own equipment.
Keep going
All guides and comparisons · Tunedzy Go on your phone · Pricing