Green Day · Dookie
Sassafras Roots
Sassafras Roots is in A flat major at 90.9 beats per minute.
Tempo
91 BPM · Andantemedian of 203 analyses · 90.8–91.1 across the middle eight tenths- Key
- A♭ major4 flats · the key most of the analyses agreed on
- Agreement
- 96%share of analyses that agreed
- Analyses
- 203people who ran the extractor
- One beat
- 660.1milliseconds, 60,000 ÷ BPM
- Tuning
- 444.1Hz · +16 cents from A 440
- Dynamics
- 3.28dB the level wanders from its average
- Loudness
- 0.954Essentia's 0–1 scale, not dB
- Danceability
- 1.149Essentia'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
203 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 96% — put it in A flat major, a key signature of 4 flats. The tempo printed above is the median of the 203 readings; 97% of them land within 2% of it, and they barely differ at all.
At 90.9 BPM one beat lasts 660.1 milliseconds, so a sixteenth note is 165 ms and a dotted eighth 495 ms — the delay times for this recording. Counted half as fast it is 45.5 BPM, counted twice as fast 181.8. A score would mark that Andante, by the ranges this site uses.
The analyses put the reference pitch of the recording at 444.1 Hz, which is 16 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 3.28 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 0.954 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 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 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 91 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 2640.3 | 0.38 |
| Half note | 2 | 1320.1 | 0.76 |
| Dotted quarter | 1.5 | 990.1 | 1.01 |
| Quarter note (one beat) | 1 | 660.1 | 1.52 |
| Quarter triplet | 0.667 | 440 | 2.27 |
| Dotted eighth | 0.75 | 495 | 2.02 |
| Eighth note | 0.5 | 330 | 3.03 |
| Eighth triplet | 0.333 | 220 | 4.55 |
| Dotted sixteenth | 0.375 | 247.5 | 4.04 |
| Sixteenth note | 0.25 | 165 | 6.06 |
| Sixteenth triplet | 0.167 | 110 | 9.09 |
| Thirty-second note | 0.125 | 82.5 | 12.12 |
Half time 45.5 BPM · double time 181.8 BPM. Every row is one beat (660.1 ms) times the fraction in the second column.
Closest in key and tempo
- Waiting for the NightDepeche ModeA♭ major91BPM
- Todo el amorDe La Ghetto, Wisin & MalumaA♭ major91BPM
- Trust MeJanis JoplinA♭ major91BPM
- Latin LingoCypress HillA♭ major91BPM
- Ramblin’ ManThe Allman Brothers BandA♭ major90BPM
- Paul RevereBeastie BoysA♭ major92BPM
- Dreamers BallQueenA♭ major92BPM
- I Got TroubleChristina AguileraA♭ major90BPM
- AirfoilScannerA♭ major90BPM
- I Don’t Believe YouP!nkA♭ major92BPM
Recordings in A flat major, ordered by how near their tempo is to 91 BPM. A calculation, not a recommendation.
All songs in A flat majorAll songs at 91 BPMA♭ major at 90–99 BPMGreen Day
MusicBrainz collapses 1 recording id into this one. Recording id ff579c58-b702-428b-a8b1-7dfcd9597e1c.