The Beatles · The Beatles

Revolution 1

Revolution 1 is in D major at 100.4 beats per minute.

Tempo

100 BPM · Andantemedian of 269 analyses · 100.3–100.5 across the middle eight tenths

Key: D major2 sharps · the key most of the analyses agreed on
Agreement: 51%share of analyses that agreed
Analyses: 269people who ran the extractor
One beat: 597.6milliseconds, 60,000 ÷ BPM
Tuning: 434.2Hz · -23 cents from A 440
Dynamics: 3.07dB the level wanders from its average
Loudness: 0.874Essentia's 0–1 scale, not dB
Danceability: 1.194Essentia's danceability, 0–3

Source: AcousticBrainz, dump of 2022-06-23 (CC0) · MusicBrainz core data, 2026-09-17 (CC0) · how each number is measured. Measured up to 23.06.2022 — AcousticBrainz stopped collecting in 2022, so nothing released after that date is here.

What the numbers say

269 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 51% — put it in D major, a key signature of 2 sharps. The tempo printed above is the median of the 269 readings; 96% of them land within 2% of it, and they barely differ at all.

At 100.4 BPM one beat lasts 597.6 milliseconds, so a sixteenth note is 149.4 ms and a dotted eighth 448.2 ms — the delay times for this recording. Counted half as fast it is 50.2 BPM, counted twice as fast 200.8. A score would mark that Andante, 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 3.07 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 0.874 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.

Beats per bar are not in this dataset. AcousticBrainz's analysis reports a tempo, a key and a loudness, and no time signature at all, so this page does not print one — a 4/4 here would be a guess dressed as a measurement.

Keys that fit with D major

Each of these differs from D major by at most one accidental, or shares its tonic. That is the whole of what a mixing wheel encodes; here the relations are named instead of numbered.

Delay times at 100 BPM

Note value	Beats	Milliseconds	Hertz
Whole note	4	2390.4	0.42
Half note	2	1195.2	0.84
Dotted quarter	1.5	896.4	1.12
Quarter note (one beat)	1	597.6	1.67
Quarter triplet	0.667	398.4	2.51
Dotted eighth	0.75	448.2	2.23
Eighth note	0.5	298.8	3.35
Eighth triplet	0.333	199.2	5.02
Dotted sixteenth	0.375	224.1	4.46
Sixteenth note	0.25	149.4	6.69
Sixteenth triplet	0.167	99.6	10.04
Thirty-second note	0.125	74.7	13.39

Half time 50.2 BPM · double time 200.8 BPM. Every row is one beat (597.6 ms) times the fraction in the second column.

Closest in key and tempo

Recordings in D major, ordered by how near their tempo is to 100 BPM. A calculation, not a recommendation.

All songs in D major All songs at 100 BPM D major at 100–109 BPM The Beatles

MusicBrainz collapses 14 recording ids into this one. Recording id 167b224b-596f-4a57-a405-08bfee59df59.