How-to · Key
How to find the key of a song
Knowing a song's key lets you sing it comfortably, remix it, sample it, or mix it smoothly into the next track. Here's how to find it with or without music theory.
Step by step
- Run it through a key finder. Upload the song to Sonar's free Key & BPM Finder. It maps every note it hears and compares them with the major and minor scales to name the key, plus a Camelot code.
- Find the home note. Hum the note the song feels like it wants to end on. That 'resting' note is usually the key's root.
- Decide major or minor. Bright and happy usually means major; darker or sadder usually means minor. A minor and C major share the same notes, so the home note decides which it is.
- Check against the chords. Play the root on a keyboard over the song. If it sounds settled at the end of the chorus, you've found the key.
Songs can change key for the last chorus. If the result seems wrong, analyze just the first verse and chorus.
What the Camelot code means
DJs use the Camelot wheel to mix in key. Each key gets a number and letter (A for minor, B for major). Tracks with the same code, one number up or down, or the same number with the other letter will blend without clashing.
For example, 8A is A minor. It mixes well with 7A, 9A and 8B (C major).
Common questions
- How can I find the key of a song for free?
- Upload the audio to a free online key finder like Sonar's Key & BPM Finder. No account is needed and the file never leaves your browser.
- How do I find the key of a song by ear?
- Hum the note the song resolves to, then find that note on a keyboard. Decide whether the song sounds major (brighter) or minor (darker).
- Why do key finders sometimes give the relative major or minor?
- Relative keys like A minor and C major use the same notes. Tools decide based on which note feels like home, and ambiguous songs can go either way.