The Reason

167 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 98% — put it in A major, a key signature of 3 sharps. The tempo printed above is the median of the 167 readings; 70% of them land within 2% of it, and the middle eight tenths of them run from 83 to 165.6 BPM.

At 165.6 BPM one beat lasts 362.3 milliseconds, so a sixteenth note is 90.6 ms and a dotted eighth 271.7 ms — the delay times for this recording. Counted half as fast it is 82.8 BPM, counted twice as fast 331.2. A score would mark that Vivace, by the ranges this site uses.

The analyses put the reference pitch of the recording at 440 Hz, which is 0 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 2.91 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 0.907 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 A major; the ones listed below are the closest in tempo.