Think

206 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 78% — put it in B flat major, a key signature of 2 flats. The tempo printed above is the median of the 206 readings; 92% of them land within 2% of it, and they barely differ at all.

At 129.2 BPM one beat lasts 464.4 milliseconds, so a sixteenth note is 116.1 ms and a dotted eighth 348.3 ms — the delay times for this recording. Counted half as fast it is 64.6 BPM, counted twice as fast 258.4. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 442.5 Hz, which is 10 cents above concert A at 440 Hz — the sort of drift a tape machine or a slightly different mastering leaves behind. That is a fact about this transfer of the music, not about how it was played.

The dynamic complexity of the recording measures 4.83 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 0.872 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 B flat major; the ones listed below are the closest in tempo.