The tool analyzes your audio using onset detection and autocorrelation. It extracts an energy envelope, detects rhythmic peaks, and finds the most likely tempo by measuring repeating patterns.
Accuracy depends on the music. Tracks with a clear, steady beat (pop, rock, electronic) are detected reliably. Complex music (jazz, classical, rubato) may show lower confidence. Use the tap tempo feature to verify.
Confidence reflects how strong and consistent the detected tempo pattern is. High confidence means a clear, repeating beat was found. Low confidence may indicate variable tempo, complex rhythm, or ambient music.
No. All analysis happens in your browser. Your audio never leaves your device.