Detect the musical key of multiple audio files directly in your browser.
Choose or drop one or more audio files to detect their key in a batch.
Tell us what worked, what didn’t, or what you’d like to see next.
Choose or drop several supported audio files. Each track is analyzed in your browser and stays in the list while the queue runs.
Automatic key detection estimates the strongest tonal center. Tracks with modulation, little harmony, or prominent effects can produce an uncertain result, so verify important transitions by ear.
Use the musical, Camelot, and Open Key values to organize a library or shortlist compatible tracks. Open the Camelot wheel when you need to compare nearby harmonic moves.
The detector estimates a track’s dominant tonal center and works best when the harmony is clear. Modulation, atonal sections, tuning differences, and effects can lead to a different result. Check important transitions by ear.
No. Files are decoded and analyzed in your browser. The audio and detected results are not sent to SirenMix’s server.
The tool accepts MP3, WAV, FLAC, OGG, OGA, and OPUS files that your browser can decode. If a file cannot be decoded, remove it and try another supported file.
Analysis runs on your device and temporarily decodes each track, so CPU performance, available memory, and track length affect the wait. Close memory-heavy tabs or apps and try the latest Chrome; if it still fails, use a computer with more available memory.
Get the latest Google ChromeUse the Camelot wheel to compare harmonic options, read the mixing-in-key guide for the theory, or open Key Changer when a track needs transposing.