3.1. Adding and Analyzing Audio

Use Add Files, Add Folder, or drag supported audio into Harmonic DJ. Folder discovery includes supported files beneath the selected folder and adds them to a durable analysis queue.

One analysis pass collects file and tag metadata, BPM, integrated loudness, level information for gain matching, and harmonic evidence for every selectable key contour. Because the underlying evidence is retained, changing the active contour or reference SPL does not decode the audio again.

Cancel asks the active discovery, library operation, or analysis queue to stop cooperatively. The track currently being analyzed may restart later, while already completed tracks remain available.

The file chooser advertises the formats supported by the current platform. These normally include common WAV, AIFF, FLAC, Ogg Vorbis, and MP3 files. AAC and ALAC in M4A containers use Media Foundation on Windows and Core Audio on macOS, so M4A is only advertised where that native decoder is available.