Stardust

131 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 73% — put it in A flat major, a key signature of 4 flats. The tempo printed above is the median of the 131 readings; 62% of them land within 2% of it, and the middle eight tenths of them run from 65.9 to 131.9 BPM.

At 65.9 BPM one beat lasts 910.5 milliseconds, so a sixteenth note is 227.6 ms and a dotted eighth 682.9 ms — the delay times for this recording. Counted half as fast it is 33 BPM, counted twice as fast 131.8. A score would mark that Adagio, by the ranges this site uses.

The analyses put the reference pitch of the recording at 436.2 Hz, which is 15 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 4.26 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 0.762 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 flat major; the ones listed below are the closest in tempo.