25 or 6 to 4

157 independent analyses of this recording were submitted to AcousticBrainz. Fewer than half of them — 46% — put it in A minor, a key signature of no sharps and no flats. The tempo printed above is the median of the 157 readings; 87% of them land within 2% of it, and they barely differ at all.

At 147.8 BPM one beat lasts 406 milliseconds, so a sixteenth note is 101.5 ms and a dotted eighth 304.5 ms — the delay times for this recording. Counted half as fast it is 73.9 BPM, counted twice as fast 295.6. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 439 Hz, which is 4 cents below 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 2.62 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 0.848 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 minor; the ones listed below are the closest in tempo.