Musical Attributes
The Musical Attributes widget is the track-level surface for supported music metadata. When a readable local audio file is available in the desktop app, its analysis helper can calculate BPM and musical key with Essentia.js.
Local analysis results
Section titled “Local analysis results”The helper accepts a local file path, decodes the audio, and returns a numeric BPM and a formatted key such as C major or A minor. It supports WAV, MP3, FLAC, AIFF, M4A, and OGG for this local analysis path and does not require network access.
If a file cannot be found, decoded, or analysed, the operation returns an error instead of creating guessed metadata. Review the result before using it in a tag, export, or release workflow.