Key?Estimated tonal centre (major or minor). Often uncertain in improvisation. Two keys mean start and middle differ.

D Dur

Stability?How long the same pitch stays in the foreground. High: the harmony holds. Low: it wanders.

stable

96%

Character?Audible onsets per minute – attacks, accents, new notes. This is not tempo (BPM).

dense

256 onsets/min

BPM reading?The stored BPM may be the fast pulse (eighths, triplets). Tactus is the slower beat you would count along with.

Pulse 172 · Tactus 89 (double time)

Harmony?Share of sustained tones versus impulses (attacks, cymbals, percussion). A rough balance, not a verdict on harmony.

58% · 42%

Timbre?warm, medium or bright – a rough estimate of whether the sound feels dark-warm or bright-sharp.

bright

Automatic estimate (librosa). · Mitte 3:01–5:01 Learn more