Atom Heart Mother: a) Father’s Shout / b) Breast Milky / c) Mother Fore / d) Funky Dung / e) Mind Your Throats Please / f) Remergence

203 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 86% — put it in E minor, a key signature of 1 sharp. The tempo printed above is the median of the 203 readings; 88% of them land within 2% of it, and the middle eight tenths of them run from 133.4 to 136.3 BPM.

At 136.1 BPM one beat lasts 440.9 milliseconds, so a sixteenth note is 110.2 ms and a dotted eighth 330.6 ms — the delay times for this recording. Counted half as fast it is 68.1 BPM, counted twice as fast 272.2. A score would mark that Allegro, 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 6.44 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 0.041 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 E minor; the ones listed below are the closest in tempo.