TempoPeek

ZZ Top · Afterburner

Velcro Fly

Velcro Fly is in B flat major at 151.6 beats per minute.

4080120160200

Tempo

152 BPM · Allegromedian of 166 analyses · 151.5–151.9 across the middle eight tenths
Key
B♭ major2 flats · the key most of the analyses agreed on
Agreement
97%share of analyses that agreed
Analyses
166people who ran the extractor
One beat
395.8milliseconds, 60,000 ÷ BPM
Tuning
434.2Hz · -23 cents from A 440
Dynamics
3.39dB the level wanders from its average
Loudness
0.942Essentia's 0–1 scale, not dB
Danceability
1.421Essentia'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

166 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 97% — put it in B flat major, a key signature of 2 flats. The tempo printed above is the median of the 166 readings; 100% of them land within 2% of it, and they barely differ at all.

At 151.6 BPM one beat lasts 395.8 milliseconds, so a sixteenth note is 98.9 ms and a dotted eighth 296.8 ms — the delay times for this recording. Counted half as fast it is 75.8 BPM, counted twice as fast 303.2. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 434.2 Hz, which is 23 cents below 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 3.39 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 0.942 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 B 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 B♭ major

Each of these differs from B♭ 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 152 BPM

Note valueBeatsMillisecondsHertz
Whole note41583.10.63
Half note2791.61.26
Dotted quarter1.5593.71.68
Quarter note (one beat)1395.82.53
Quarter triplet0.667263.93.79
Dotted eighth0.75296.83.37
Eighth note0.5197.95.05
Eighth triplet0.333131.97.58
Dotted sixteenth0.375148.46.74
Sixteenth note0.2598.910.11
Sixteenth triplet0.1676615.16
Thirty-second note0.12549.520.21

Half time 75.8 BPM · double time 303.2 BPM. Every row is one beat (395.8 ms) times the fraction in the second column.

Closest in key and tempo

  1. Bloody Well RightSupertrampB♭ major151BPM
  2. For Crying Out LoudMeat LoafB♭ major151BPM
  3. All Neon LikeBjörkB♭ major152BPM
  4. SugeDaBabyB♭ major151BPM
  5. Eyes of the WorldFleetwood MacB♭ major152BPM
  6. All Shook UpElvis PresleyB♭ major151BPM
  7. One Love / People Get ReadyBob Marley & The WailersB♭ major153BPM
  8. Mask OffFutureB♭ major150BPM
  9. Make You Feel My LoveAdeleB♭ major153BPM
  10. Sk8er BoiAvril LavigneB♭ major150BPM

Recordings in B flat major, ordered by how near their tempo is to 152 BPM. A calculation, not a recommendation.

All songs in B flat majorAll songs at 152 BPMB♭ major at 150–159 BPMZZ Top

MusicBrainz collapses 9 recording ids into this one. Recording id 0b24d56c-9cf8-4f3e-995f-f69715f8d3df.