Supported Formats
The Library recognises these audio extensions, without regard to letter case:
| Format | Extensions | Local playback |
|---|---|---|
| WAV | .wav |
Supported |
| MP3 | .mp3 |
Supported |
| AIFF | .aiff, .aif |
Prepared automatically in the macOS desktop app |
| FLAC | .flac |
Supported |
| M4A | .m4a |
Supported |
| OGG | .ogg |
Supported |
When you play a local AIFF bounce in The Library desktop app for macOS, the app automatically prepares a temporary WAV using Apple’s built-in audio tools. The first play may remain in the normal loading state briefly; later plays reuse the prepared copy when the source has not changed.
The original AIFF remains your canonical bounce. The Library does not rename it, edit it, add a duplicate beside it, or upload the temporary WAV to Dropbox. The temporary file stays in the app’s private operating-system cache.
Automatic AIFF preparation in this release is specific to the macOS desktop app. Browser, public-share, mobile, and Windows playback still depend on their platform’s decoder and may not play a raw AIFF source.
An extension is used to identify a supported audio file. It is not a guarantee that every file can be decoded, analysed, streamed, or imported successfully; the file must still be readable in the active environment.
This article deliberately does not claim a fixed supported-project-file list. Project-file handling and local folder rules are separate from the audio-format check.