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.

shifting

16%

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

very dense

305 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 161 · Tactus 81 (double time)

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

70% · 30%

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

medium

Automatic estimate (librosa). · Mitte 3:58–5:58 Learn more