Summary

The Tunebat Song Key & BPM Finder is a browser-based audio analysis tool designed to identify the key and tempo (BPM) of uploaded audio tracks. It is aimed primarily at DJs, music producers, and anyone interested in analyzing their music.

Features

• Upload audio files (MP3, WAV, FLAC, AAC, OGG, M4A) directly in the browser for analysis.
• Key and BPM detection with estimates based on advanced algorithms developed by the Music Technology Group at UPF.
• Additional AI-powered sentiment analysis providing energy, danceability, and happiness estimates.
• All processing occurs client-side; audio files are not uploaded to any server.
• No file size limit as long as the local system and algorithms can handle the file.
• Results presented in a table with key & BPM estimates and additional data depending on the user plan.
• Free and Pro subscription plans offer varying features such as ad removal, saving and downloading results, and advanced analysis options.

How to Use

1. Prepare audio files on your computer.
2. Drag and drop or browse to upload files on the webpage.
3. Wait for automatic analysis in the browser.
4. View the results once analysis is completed.

Technology and Accuracy

The tool uses detection algorithms developed and tuned by audio experts including PhD holders, using machine learning for sentiment analysis based on large datasets. It offers accuracy comparable to commercial key and BPM detection software, though results may differ from Spotify's database due to algorithmic differences.

Additional Information

The tool offers related functions like BPM Tapper and a Key & BPM Changer available on the same platform. Support is provided via email, and the tool currently lacks a dedicated API for the finder but offers a separate music metadata API.