MP3 vs FLAC

For most people on typical speakers or earbuds, the difference is imperceptible at 320 kbps MP3. On high-end audio equipment in quiet environments, trained ears can detect subtle artefacts. The difference is most noticeable with complex music like classical or jazz.

FLAC preserves 100% of the original audio data, while MP3 discards data using psychoacoustic models. FLAC is objectively better in quality, but the audible difference depends on your hardware and listening environment.

No. Converting MP3 to FLAC creates a lossless container around lossy audio. The data already discarded during MP3 encoding cannot be recovered. You will get a larger file with the same quality as the original MP3.

Spotify uses Ogg Vorbis. Apple Music uses AAC. Tidal and Qobuz offer FLAC or FLAC-equivalent lossless streaming. Most streaming services do not deliver standard FLAC files to consumers.

A typical 4-minute song is roughly 4–10 MB as MP3 (at 128–320 kbps) and 20–35 MB as FLAC. A 1,000-song music library might be ~8 GB in MP3 format and ~25–50 GB in FLAC.