Persuasion

140 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 100% — put it in F minor, a key signature of 4 flats. The tempo printed above is the median of the 140 readings; 80% of them land within 2% of it, and the middle eight tenths of them run from 129.3 to 132.4 BPM.

At 132.3 BPM one beat lasts 453.5 milliseconds, so a sixteenth note is 113.4 ms and a dotted eighth 340.1 ms — the delay times for this recording. Counted half as fast it is 66.2 BPM, counted twice as fast 264.6. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 441 Hz, which is 4 cents above concert A at 440 Hz — close enough to standard that a tuner would not argue. That is a fact about this transfer of the music, not about how it was played.

The dynamic complexity of the recording measures 2.55 dB: that is how far the level wanders from its own average, so a small number means a loud, flat master and a large one means a recording that still breathes. Its average loudness is 0.929 on Essentia's 0-to-1 scale, which is not decibels and is not comparable to a streaming service's number.

10 other recordings here are in F minor; the ones listed below are the closest in tempo.