What the analyzer reports
| Result | What it means | How to use it |
|---|---|---|
| BPM | Beats per minute of the main pulse | Match tempo for DJ mixes, edits and click tracks |
| Half / double time | The same groove counted at half or twice the speed | Pick the one that matches how you count the song |
| BPM confidence | How clearly one tempo stood out | Low confidence: check with tap tempo |
| Key | Tonal centre, major or minor | Choose a capo, transpose or harmonise |
| Camelot code | Key as a number 1 to 12 plus A (minor) or B (major) | Mix songs with the same or neighbouring code |
| Runner-up key | The second most likely key, often the relative major or minor | Decide by ear when the two are close |
| Pitch-class chart | How much of each of the 12 notes the song uses | See why the key was chosen |
The analyzer listens to a window of up to 90 seconds. For songs longer than about 100 seconds it starts a fifth of the way in, which skips most intros. Songs that change key or tempo part way through get the result for that window.
Test it on songs with a known tempo
An analyzer is easiest to trust when you test it on something you know. These two songs were generated with TuneSplit from the same prompt, which asked for upbeat indie pop at 112 BPM. Download one, drop it on the analyzer and compare.
Go deeper with AI stems
Tempo and key describe the whole mix. To analyze the arrangement, separate it. The stem splitter uses the Demucs htdemucs AI model to split a song into vocals, drums, bass and other. This is a real result:
- Structure: play the drums stem and note where the beat changes or drops out. That is usually where verse, chorus and bridge change.
- Bassline: solo the bass stem to hear the root notes, which confirms the key and shows the chord changes.
- Vocal layers: in the vocals stem you can hear doubles, harmonies and ad-libs that are hidden in the mix.
- Production: the other stem holds synths, guitars and keys, so you can hear how sparse or dense the arrangement is.
One full split a day is free, up to 10 minutes per song, with MP3 downloads. Files are deleted within 24 hours and never used for training.
What this analyzer does not do
Some AI song analyzers also guess mood, genre, lyrics meaning or label sections automatically. This one does not. It reports what it can measure, tempo, key and the separated parts, and leaves the judgement to your ears. If you need section timestamps, the drums and bass stems usually make the changes easy to mark by hand in any editor.
| Analyzer type | Typical output | Examples |
|---|---|---|
| Tempo and key | BPM, key, Camelot | This page, BPM and key finder |
| Structure and lyrics | Sections, mood, genre, lyric themes | Song Analyzer AI, Musci song analyzer |
| Mix and mastering check | Loudness, balance, mastering notes | Mix Check Studio, SignalKey |
| AI detection | Human, hybrid or AI prediction | SubmitHub AI song checker |
Free limits on other tools change, so check their current terms.
Frequently asked questions
Is there a free AI song analyzer?
Yes. This page finds BPM, key and Camelot code in your browser for free with no upload and no limit, and the AI stem splitter separates a song into vocals, drums, bass and other once a day for free. No sign-up is needed for either.
How do I find the BPM and key of a song?
Drop the file on the analyzer above. In a few seconds it shows the BPM, half and double-time options, the key, the Camelot code and a confidence score. You can also tap along with the tap tempo button to check the BPM.
Does it detect mood, genre or song structure?
No. It measures tempo and key and can split the song into stems. Mood and genre are not detected. For structure, split the song and listen to the drums and bass stems, where section changes are easy to hear.
Is my song uploaded?
Not for BPM and key: the analysis runs inside your browser. The stem split runs on our server; those files are stored privately, deleted within 24 hours and never used to train a model.
Why does it show two BPM values?
Many grooves can be counted at half or double speed, for example 70 and 140 BPM. The analyzer shows the main value and the alternatives; pick the one that matches how you count the beat.
How accurate is the key?
Most songs with a clear tonal centre come out right, and the confidence score tells you when it is unsure. The runner-up key is often the relative major or minor, which uses the same notes, so check by ear when the two are close.
What is a Camelot code?
A label for a key made of a number from 1 to 12 and a letter, A for minor and B for major. Songs with the same code, or a code one number away, usually mix smoothly.