Convert M4B audio to FLAC online for free.
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FLAC is lossless audio compression — ~50% the size of WAV with mathematically identical audio. The audiophile format of choice: Tidal HiFi and Amazon Music HD stream FLAC, and vinyl-rip communities archive in it. Convert to FLAC when your destination is critical listening on capable gear, or long-term archival of source recordings.
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert M4B files to FLAC.
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