O Come All Ye Faithful

185 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 100% — put it in G major, a key signature of 1 sharp. The tempo printed above is the median of the 185 readings; 100% of them land within 2% of it, and they barely differ at all.

At 75 BPM one beat lasts 800 milliseconds, so a sixteenth note is 200 ms and a dotted eighth 600 ms — the delay times for this recording. Counted half as fast it is 37.5 BPM, counted twice as fast 150. A score would mark that Adagio, 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 3.5 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 0.879 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 G major; the ones listed below are the closest in tempo.