Black Sabbath · Mob Rules
The Mob Rules
The Mob Rules is in D flat major at 136.9 beats per minute.
Tempo
137 BPM · Allegromedian of 204 analyses · 136.8–143.5 across the middle eight tenths- Key
- D♭ major5 flats · the key most of the analyses agreed on
- Agreement
- 87%share of analyses that agreed
- Analyses
- 204people who ran the extractor
- One beat
- 438.3milliseconds, 60,000 ÷ BPM
- Tuning
- 441.5Hz · +6 cents from A 440
- Dynamics
- 3.14dB the level wanders from its average
- Loudness
- 0.862Essentia's 0–1 scale, not dB
- Danceability
- 1.111Essentia'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
204 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 87% — put it in D flat major, a key signature of 5 flats. The tempo printed above is the median of the 204 readings; 89% of them land within 2% of it, and the middle eight tenths of them run from 136.8 to 143.5 BPM.
At 136.9 BPM one beat lasts 438.3 milliseconds, so a sixteenth note is 109.6 ms and a dotted eighth 328.7 ms — the delay times for this recording. Counted half as fast it is 68.5 BPM, counted twice as fast 273.8. A score would mark that Allegro, by the ranges this site uses.
The analyses put the reference pitch of the recording at 441.5 Hz, which is 6 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 3.14 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 0.862 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 flat 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 137 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1753.1 | 0.57 |
| Half note | 2 | 876.6 | 1.14 |
| Dotted quarter | 1.5 | 657.4 | 1.52 |
| Quarter note (one beat) | 1 | 438.3 | 2.28 |
| Quarter triplet | 0.667 | 292.2 | 3.42 |
| Dotted eighth | 0.75 | 328.7 | 3.04 |
| Eighth note | 0.5 | 219.1 | 4.56 |
| Eighth triplet | 0.333 | 146.1 | 6.85 |
| Dotted sixteenth | 0.375 | 164.4 | 6.08 |
| Sixteenth note | 0.25 | 109.6 | 9.13 |
| Sixteenth triplet | 0.167 | 73 | 13.69 |
| Thirty-second note | 0.125 | 54.8 | 18.25 |
Half time 68.5 BPM · double time 273.8 BPM. Every row is one beat (438.3 ms) times the fraction in the second column.
Closest in key and tempo
- One Thing Leads to AnotherThe FixxD♭ major137BPM
- SparksColdplayD♭ major138BPM
- Venus as a BoyBjörkD♭ major136BPM
- Before the LobotomyGreen DayD♭ major136BPM
- Please Don’t Leave MeP!nkD♭ major138BPM
- Earth SongMichael JacksonD♭ major138BPM
- Drown in My Own TearsRay CharlesD♭ major135BPM
- Whatever It TakesImagine DragonsD♭ major135BPM
- No Cars GoArcade FireD♭ major135BPM
- Rock’n RollDaft PunkD♭ major135BPM
Recordings in D flat major, ordered by how near their tempo is to 137 BPM. A calculation, not a recommendation.
All songs in D flat majorAll songs at 137 BPMD♭ major at 130–139 BPMBlack Sabbath
MusicBrainz collapses 26 recording ids into this one. Recording id 9e2f0f8f-fc91-438e-9f1b-4a9dc3319d4e.