Key & Scale Detector
Upload any audio file to instantly detect its musical key and scale. 100% free, private, and secure.
Click to select an audio file
or drag and drop it here
Why do you need to know the key of a song?
Knowing the musical key of a song is the absolute foundation of music production and DJing. If you are a producer trying to add an 808 bassline or a synth melody to an acapella, you have to know the key. If you guess wrong, your entire beat will sound incredibly dissonant and amateur.
For DJs, knowing the key allows you to perform harmonic mixing, ensuring that your transitions sound smooth and musical rather than clashing and harsh.
How to find the key instantly
Upload the song, sample, or acapella you want to analyze. Our engine scans the harmonic content of the file and determines the dominant root note and whether the scale is major or minor.
It will give you the standard musical key (like C Minor) as well as the Camelot wheel number (like 5A) which is perfect for DJs. You can then use this information to tune your instruments, buy compatible sample packs, or plan your next DJ set.
Frequently Asked Questions
Does it work on acapellas?
Yes. Even without chords playing in the background, the detector can usually analyze the vocal melodies and determine the key the singer is performing in.
What if a song changes key in the middle?
The detector gives you the overall fundamental key of the track. If a song modulates or changes key halfway through, the algorithm usually outputs the key that the song started in.
Is the Camelot number different from the musical key?
No, it is just a different naming system. "8A" on the Camelot wheel is exactly the same thing as A Minor. It is just formatted as a number to make it easier for DJs to memorize.