Guilty

250 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 98% — put it in C major, a key signature of no sharps and no flats. The tempo printed above is the median of the 250 readings; 98% of them land within 2% of it, and they barely differ at all.

At 151 BPM one beat lasts 397.4 milliseconds, so a sixteenth note is 99.3 ms and a dotted eighth 298 ms — the delay times for this recording. Counted half as fast it is 75.5 BPM, counted twice as fast 302. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 441.5 Hz, which is 6 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 5.02 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 0.72 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 C major; the ones listed below are the closest in tempo.