The Who · A Quick One (Happy Jack)
Happy Jack
Happy Jack is in D major at 129.6 beats per minute.
Tempo
130 BPM · Allegromedian of 249 analyses · 127–135.1 across the middle eight tenths- Key
- D major2 sharps · the key most of the analyses agreed on
- Agreement
- 86%share of analyses that agreed
- Analyses
- 249people who ran the extractor
- One beat
- 463milliseconds, 60,000 ÷ BPM
- Tuning
- 441.3Hz · +5 cents from A 440
- Dynamics
- 4.33dB the level wanders from its average
- Loudness
- 0.822Essentia's 0–1 scale, not dB
- Danceability
- 1.112Essentia'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
249 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 86% — put it in D major, a key signature of 2 sharps. The tempo printed above is the median of the 249 readings; 62% of them land within 2% of it, and the middle eight tenths of them run from 127 to 135.1 BPM.
At 129.6 BPM one beat lasts 463 milliseconds, so a sixteenth note is 115.7 ms and a dotted eighth 347.2 ms — the delay times for this recording. Counted half as fast it is 64.8 BPM, counted twice as fast 259.2. A score would mark that Allegro, by the ranges this site uses.
The analyses put the reference pitch of the recording at 441.3 Hz, which is 5 cents above 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 4.33 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 0.822 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 130 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1851.9 | 0.54 |
| Half note | 2 | 925.9 | 1.08 |
| Dotted quarter | 1.5 | 694.4 | 1.44 |
| Quarter note (one beat) | 1 | 463 | 2.16 |
| Quarter triplet | 0.667 | 308.6 | 3.24 |
| Dotted eighth | 0.75 | 347.2 | 2.88 |
| Eighth note | 0.5 | 231.5 | 4.32 |
| Eighth triplet | 0.333 | 154.3 | 6.48 |
| Dotted sixteenth | 0.375 | 173.6 | 5.76 |
| Sixteenth note | 0.25 | 115.7 | 8.64 |
| Sixteenth triplet | 0.167 | 77.2 | 12.96 |
| Thirty-second note | 0.125 | 57.9 | 17.28 |
Half time 64.8 BPM · double time 259.2 BPM. Every row is one beat (463 ms) times the fraction in the second column.
Closest in key and tempo
- I Know but I Don’t KnowBlondieD major130BPM
- Jimmy JazzThe ClashD major129BPM
- Flick of the SwitchAC/DCD major129BPM
- HeadwiresFoo FightersD major130BPM
- The Narrow Way, Part 3David GilmourD major129BPM
- What You’re DoingThe BeatlesD major129BPM
- Maggie MayRod StewartD major129BPM
- Yeah 3×Chris BrownD major130BPM
- Ramble TambleCreedence Clearwater RevivalD major130BPM
- Up Around the BendCreedence Clearwater RevivalD major130BPM
Recordings in D major, ordered by how near their tempo is to 130 BPM. A calculation, not a recommendation.
All songs in D majorAll songs at 130 BPMD major at 120–129 BPMThe Who
MusicBrainz collapses 59 recording ids into this one. Recording id 8a25cb86-620b-49a7-9058-10c683828fce.