FLAC
Free Lossless Audio CodecUsed for lossless music archiving.
- Family
- Audio
- MIME
- audio/flac
Convert FLAC to iPod Audio online. See the real timed-stream transcoding behavior, preservation limits, and a format-specific acceptance test.
The waveform and channel layout inside FLAC is decoded first, then re-encoded into iPod Audio's own codec and container profile. Duration typically holds steady even as compression, channel mapping, frame cadence, or auxiliary streams shift underneath it. FLAC frames decode to lossless samples, but the stream can still carry unusual channel assignments, sample rates, cuesheets, and Vorbis-comment metadata.
Decoded from losslessly compressed audio that preserves decoded samples and supports rich tags. Encoded to an M4A (AAC) preset for iPod-family devices, whose firmware and libraries center on AAC/M4A rather than MP3 or open lossless formats.
Used for lossless music archiving.
Designed for recorded sound meant for playback over time.
FLAC does not make a lossy source lossless again, and some basic players reject less common sample rates or channel layouts.
No click-wheel-era iPod, across classic, nano, or shuffle, ever gained native FLAC or Ogg Vorbis playback, so a file left in either container can be skipped or silently fail on the device unless it is first converted to AAC/M4A or another Apple-supported format such as MP3, Apple Lossless, AIFF, or WAV.
This preset always outputs AAC-encoded audio in an M4A container at a single fixed bitrate and profile regardless of which iPod generation is selected; that works because every iPod model's documented codec support (AAC, Protected AAC, MP3, Apple Lossless, AIFF, WAV) centers on AAC/M4A as Apple's preferred delivery format, so normalizing to M4A maximizes compatibility across the iPod line without per-model tuning.
Compare duration, sample rate, channels, peak levels, and tags with the decoded source.
Sync the converted track to an iPod through iTunes, Finder, or a supported sync tool, then confirm it shows up in the on-device library with intact tags and cover art and plays back correctly.
Choose iPod Audio only after the player, editor, or publishing service confirms its container and codecs; keep FLAC if extra tracks or source encoding must survive.