TempoPeek

Green Day · American Idiot

Boulevard of Broken Dreams

Boulevard of Broken Dreams is in A flat major at 166 beats per minute.

4080120160200

Tempo

166 BPM · Vivacemedian of 280 analyses · 165.9–166.1 across the middle eight tenths
Key
A♭ major4 flats · the key most of the analyses agreed on
Agreement
97%share of analyses that agreed
Analyses
280people who ran the extractor
One beat
361.4milliseconds, 60,000 ÷ BPM
Tuning
441Hz · +4 cents from A 440
Dynamics
2.47dB the level wanders from its average
Loudness
0.955Essentia's 0–1 scale, not dB
Danceability
1.071Essentia'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

280 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 97% — put it in A flat major, a key signature of 4 flats. The tempo printed above is the median of the 280 readings; 100% of them land within 2% of it, and they barely differ at all.

At 166 BPM one beat lasts 361.4 milliseconds, so a sixteenth note is 90.4 ms and a dotted eighth 271.1 ms — the delay times for this recording. Counted half as fast it is 83 BPM, counted twice as fast 332. A score would mark that Vivace, by the ranges this site uses.

The analyses put the reference pitch of the recording at 441 Hz, which is 4 cents above concert A at 440 Hz — close enough to standard that a tuner would not argue. That is a fact about this transfer of the music, not about how it was played.

The dynamic complexity of the recording measures 2.47 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 0.955 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 166 BPM

Note valueBeatsMillisecondsHertz
Whole note41445.80.69
Half note2722.91.38
Dotted quarter1.5542.21.84
Quarter note (one beat)1361.42.77
Quarter triplet0.6672414.15
Dotted eighth0.75271.13.69
Eighth note0.5180.75.53
Eighth triplet0.333120.58.3
Dotted sixteenth0.375135.57.38
Sixteenth note0.2590.411.07
Sixteenth triplet0.16760.216.6
Thirty-second note0.12545.222.13

Half time 83 BPM · double time 332 BPM. Every row is one beat (361.4 ms) times the fraction in the second column.

Closest in key and tempo

  1. Last ChildAerosmithA♭ major166BPM
  2. You’ve Got a FriendCarole KingA♭ major166BPM
  3. You LearnAlanis MorissetteA♭ major167BPM
  4. Slow and LowBeastie BoysA♭ major167BPM
  5. A Change Is Gonna ComeOtis ReddingA♭ major164BPM
  6. The Boys Are Back in TownThin LizzyA♭ major163BPM
  7. Wasting My HateMetallicaA♭ major163BPM
  8. Nip It in the BudThe B‐52’sA♭ major163BPM
  9. If I Could Turn Back the Hands of TimeR. KellyA♭ major162BPM
  10. Digging in the DirtPeter GabrielA♭ major162BPM

Recordings in A flat major, ordered by how near their tempo is to 166 BPM. A calculation, not a recommendation.

All songs in A flat majorAll songs at 166 BPMA♭ major at 160–169 BPMGreen Day

MusicBrainz collapses 31 recording ids into this one. Recording id 0ba72f0d-70ae-4655-94d9-c1069b5abcfb.