The Song Remains the Same

309 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 80% — put it in D major, a key signature of 2 sharps. The tempo printed above is the median of the 309 readings; 93% of them land within 2% of it, and the middle eight tenths of them run from 144.4 to 146 BPM.

At 144.9 BPM one beat lasts 414.1 milliseconds, so a sixteenth note is 103.5 ms and a dotted eighth 310.6 ms — the delay times for this recording. Counted half as fast it is 72.5 BPM, counted twice as fast 289.8. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 434.2 Hz, which is 23 cents below 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 2.67 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 0.909 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 D major; the ones listed below are the closest in tempo.