The Beatles · The Beatles
Birthday
Birthday is in A major at 139.2 beats per minute.
Tempo
139 BPM · Allegromedian of 221 analyses · 139.1–139.2 across the middle eight tenths- Key
- A major3 sharps · the key most of the analyses agreed on
- Agreement
- 92%share of analyses that agreed
- Analyses
- 221people who ran the extractor
- One beat
- 431milliseconds, 60,000 ÷ BPM
- Tuning
- 434.2Hz · -23 cents from A 440
- Dynamics
- 1.87dB the level wanders from its average
- Loudness
- 0.968Essentia's 0–1 scale, not dB
- Danceability
- 1.362Essentia'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
221 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 92% — put it in A major, a key signature of 3 sharps. The tempo printed above is the median of the 221 readings; 96% of them land within 2% of it, and they barely differ at all.
At 139.2 BPM one beat lasts 431 milliseconds, so a sixteenth note is 107.8 ms and a dotted eighth 323.3 ms — the delay times for this recording. Counted half as fast it is 69.6 BPM, counted twice as fast 278.4. 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 1.87 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 0.968 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 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 A major
Each of these differs from A 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 139 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1724.1 | 0.58 |
| Half note | 2 | 862.1 | 1.16 |
| Dotted quarter | 1.5 | 646.6 | 1.55 |
| Quarter note (one beat) | 1 | 431 | 2.32 |
| Quarter triplet | 0.667 | 287.4 | 3.48 |
| Dotted eighth | 0.75 | 323.3 | 3.09 |
| Eighth note | 0.5 | 215.5 | 4.64 |
| Eighth triplet | 0.333 | 143.7 | 6.96 |
| Dotted sixteenth | 0.375 | 161.6 | 6.19 |
| Sixteenth note | 0.25 | 107.8 | 9.28 |
| Sixteenth triplet | 0.167 | 71.8 | 13.92 |
| Thirty-second note | 0.125 | 53.9 | 18.56 |
Half time 69.6 BPM · double time 278.4 BPM. Every row is one beat (431 ms) times the fraction in the second column.
Closest in key and tempo
- The Way We WereBarbra StreisandA major139BPM
- Train of Thoughta‐haA major140BPM
- Girl Keeps Coming ApartAerosmithA major140BPM
- Song for Bob DylanDavid BowieA major140BPM
- St. JimmyGreen DayA major139BPM
- School DaysAC/DCA major139BPM
- Baby We’ve Got a Date (Rock It Baby)The WailersA major139BPM
- Mississippi QueenMountainA major140BPM
- Down in the ParkFoo FightersA major140BPM
- Eight Days a WeekThe BeatlesA major138BPM
Recordings in A major, ordered by how near their tempo is to 139 BPM. A calculation, not a recommendation.
All songs in A majorAll songs at 139 BPMA major at 130–139 BPMThe Beatles
MusicBrainz collapses 34 recording ids into this one. Recording id 2438d03e-c7a9-4876-be5b-ad260bc5c027.