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

shifting (G Dur → E Moll)

Start G Dur · middle E Moll

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

shifting

24%

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

very dense

310 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 99 · Tactus 101

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

75% · 25%

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

bright

Automatic estimate (librosa). · Mitte 2:21–4:21 Learn more