Lossy Lossless Audio
Lossy audio saves space by removing data. Lossless audio preserves the source while using more storage.
The simple difference
Lossy audio makes files smaller by permanently removing some audio information. MP3, AAC, and Opus are common lossy codecs.
Lossless audio preserves the original audio data. FLAC, ALAC, and uncompressed WAV are common lossless choices.
Lossy vs lossless at a glance
| Feature | Lossy | Lossless |
|---|---|---|
| Examples | MP3, AAC, Opus | FLAC, ALAC, WAV |
| File size | Smaller | Larger |
| Quality | Depends on bitrate and codec | Preserves source audio |
| Best use | Streaming, mobile, sharing | Archiving, editing, serious libraries |
When lossy is fine
Lossy audio is often fine for commuting, casual listening, streaming, podcasts, voice chat, or any situation where file size and bandwidth matter more than perfect preservation.
When lossless is better
Lossless audio is better when you want a long-term collection, plan to convert files later, care about preserving a CD rip, or want a clean source for editing.
Frequently asked questions
Is Spotify lossless?
Spotify has historically used lossy streaming formats. Always check the current plan and quality settings for any streaming service.
Can lossy audio sound good?
Yes. Good lossy encoders at moderate or high bitrates can sound very good, especially for casual listening.
Can lossless become lossy?
Yes. If you convert FLAC or WAV to MP3 or AAC, the new file becomes lossy.
Should I use lossy or lossless?
Use lossless for archiving and important libraries. Use lossy when small files, streaming, and compatibility matter most.