Green Day · 21st Century Breakdown
See the Light
See the Light is in A flat major at 140.7 beats per minute.
Tempo
141 BPM · Allegromedian of 153 analyses · 140.7–140.8 across the middle eight tenths- Key
- A♭ major4 flats · the key most of the analyses agreed on
- Agreement
- 100%share of analyses that agreed
- Analyses
- 153people who ran the extractor
- One beat
- 426.4milliseconds, 60,000 ÷ BPM
- Tuning
- 441.5Hz · +6 cents from A 440
- Dynamics
- 6.22dB the level wanders from its average
- Loudness
- 0.819Essentia's 0–1 scale, not dB
- Danceability
- 1.158Essentia'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
153 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 100% — put it in A flat major, a key signature of 4 flats. The tempo printed above is the median of the 153 readings; 99% of them land within 2% of it, and they barely differ at all.
At 140.7 BPM one beat lasts 426.4 milliseconds, so a sixteenth note is 106.6 ms and a dotted eighth 319.8 ms — the delay times for this recording. Counted half as fast it is 70.4 BPM, counted twice as fast 281.4. 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 6.22 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 0.819 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 141 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1705.8 | 0.59 |
| Half note | 2 | 852.9 | 1.17 |
| Dotted quarter | 1.5 | 639.7 | 1.56 |
| Quarter note (one beat) | 1 | 426.4 | 2.34 |
| Quarter triplet | 0.667 | 284.3 | 3.52 |
| Dotted eighth | 0.75 | 319.8 | 3.13 |
| Eighth note | 0.5 | 213.2 | 4.69 |
| Eighth triplet | 0.333 | 142.1 | 7.04 |
| Dotted sixteenth | 0.375 | 159.9 | 6.25 |
| Sixteenth note | 0.25 | 106.6 | 9.38 |
| Sixteenth triplet | 0.167 | 71.1 | 14.07 |
| Thirty-second note | 0.125 | 53.3 | 18.76 |
Half time 70.4 BPM · double time 281.4 BPM. Every row is one beat (426.4 ms) times the fraction in the second column.
Closest in key and tempo
- The Power of LoveCéline DionA♭ major140BPM
- Ayo Technology50 Cent feat. Justin Timberlake & TimbalandA♭ major140BPM
- Because of YouKelly ClarksonA♭ major140BPM
- Wildest DreamsTaylor SwiftA♭ major140BPM
- Just Like Jesse JamesCherA♭ major140BPM
- Don’t Let Him Steal Your Heart AwayPhil CollinsA♭ major139BPM
- Raised by WolvesU2A♭ major142BPM
- If She Would Have Been Faithful…ChicagoA♭ major142BPM
- Carry OnCrosby, Stills, Nash & YoungA♭ major139BPM
- Round and RoundImagine DragonsA♭ major142BPM
Recordings in A flat major, ordered by how near their tempo is to 141 BPM. A calculation, not a recommendation.
All songs in A flat majorAll songs at 141 BPMA♭ major at 140–149 BPMGreen Day
MusicBrainz collapses 1 recording id into this one. Recording id 8088bcc9-a9c8-40c5-9b3a-dc3b033e4fe7.