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Audio

When you add an audio file to Flux, the conversion dialog lets you tune exactly how it should be processed. At the top of the dialog is a Local / FileFlows toggle:

  • Local — Process the audio directly inside Flux using the options below.
  • FileFlows — Send the audio to a FileFlows Server using the formula configured on the server.

Some advanced options (such as loudness normalization) are only available when processing through a FileFlows Server, because they rely on server-side plugins.

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Codec​

CodecExtensionNotes
MP3mp3Universal compatibility.
AACm4aEfficient compression; ideal for Apple devices.
FLACflacLossless compression; no quality loss.
OpusopusBest compression-to-quality ratio for speech and music.

Bitrate​

Set the target audio bitrate in kbps. Higher values preserve more detail but increase file size.

Sample rate​

Choose an output sample rate or leave it on Automatic to match the source. Common options include 44100 Hz, 48000 Hz, and 96000 Hz.

Normalization​

When processing through a FileFlows Server, you can apply loudness normalization:

  • Music — Target loudness for music playback.
  • Broadcast — Target loudness for broadcast standards.
  • Voice — Target loudness for spoken-word content.

Local processing currently does not apply normalization; it is handled by the server-side audio flow.

Rename format​

Rename output audio files using metadata placeholders such as {AlbumArtist}, {Album}, {Track}, {Title}, {Year}, and {Codec}.