A Spotify Audio Features alternative
Spotify stopped giving new apps access to Audio Features and Audio Analysis on 27 November 2024. StemX measures key and BPM from the audio you upload, so it works for any track, including unreleased music.
| Feature | StemX | Spotify |
|---|---|---|
| Works on | Any audio file you upload | Tracks in Spotify's catalogue only |
| Key and BPM | Measured from the audio; a key only when confident | Closed to new apps since 2024-11-27 |
| Also returns | Six stems with MIDI | Not applicable |
| Price | Via the API: kind=analysis, no minutes used, 100 a day per account. Free on the web too. | Not available to new apps |
Checked 2026-10-02. StemX returns six stems: vocals, drums, bass, guitar, piano and other. Key: When it answers, it's right about 80% of the time. It answers on about 44% of songs.
Frequently asked questions
Can I get danceability or energy like Spotify had?
No. StemX returns key and BPM only.
How accurate is it?
See the accuracy figures on the BPM finder and key finder pages; they are measured on real music.