TempoPeek

Björk · Vespertine

Undo

Undo is in B flat major at 115 beats per minute.

4080120160200

Tempo

115 BPM · Moderatomedian of 189 analyses · 114.7–115.1 across the middle eight tenths
Key
B♭ major2 flats · the key most of the analyses agreed on
Agreement
100%share of analyses that agreed
Analyses
189people who ran the extractor
One beat
521.7milliseconds, 60,000 ÷ BPM
Tuning
438.2Hz · -7 cents from A 440
Dynamics
5.82dB the level wanders from its average
Loudness
0.24Essentia's 0–1 scale, not dB
Danceability
0.939Essentia'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

189 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 100% — put it in B flat major, a key signature of 2 flats. The tempo printed above is the median of the 189 readings; 100% of them land within 2% of it, and they barely differ at all.

At 115 BPM one beat lasts 521.7 milliseconds, so a sixteenth note is 130.4 ms and a dotted eighth 391.3 ms — the delay times for this recording. Counted half as fast it is 57.5 BPM, counted twice as fast 230. A score would mark that Moderato, by the ranges this site uses.

The analyses put the reference pitch of the recording at 438.2 Hz, which is 7 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 5.82 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 0.24 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 115 BPM

Note valueBeatsMillisecondsHertz
Whole note420870.48
Half note21043.50.96
Dotted quarter1.5782.61.28
Quarter note (one beat)1521.71.92
Quarter triplet0.667347.82.88
Dotted eighth0.75391.32.56
Eighth note0.5260.93.83
Eighth triplet0.333173.95.75
Dotted sixteenth0.375195.75.11
Sixteenth note0.25130.47.67
Sixteenth triplet0.1678711.5
Thirty-second note0.12565.215.33

Half time 57.5 BPM · double time 230 BPM. Every row is one beat (521.7 ms) times the fraction in the second column.

Closest in key and tempo

  1. Say It Loud – I’m Black and I’m Proud, Pt. 1James BrownB♭ major115BPM
  2. Music, Music, MusicRay CharlesB♭ major115BPM
  3. Downtown TrainRod StewartB♭ major115BPM
  4. A+EClean Bandit feat. Kandaka Moore & Nikki CislynB♭ major115BPM
  5. The Way You Make Me FeelMichael JacksonB♭ major115BPM
  6. CreamPrince & The New Power GenerationB♭ major116BPM
  7. TreasureBruno MarsB♭ major116BPM
  8. PolaroidJonas Blue, Liam Payne & Lennon StellaB♭ major114BPM
  9. Undisclosed DesiresMuseB♭ major116BPM
  10. Yes I WillBackstreet BoysB♭ major116BPM

Recordings in B flat major, ordered by how near their tempo is to 115 BPM. A calculation, not a recommendation.

All songs in B flat majorAll songs at 115 BPMB♭ major at 110–119 BPMBjörk

MusicBrainz collapses 19 recording ids into this one. Recording id 94db0c98-33d8-4348-8a15-cdf299b25b25.