TempoPeek

The Wailers · Catch a Fire

Baby We’ve Got a Date (Rock It Baby)

Baby We’ve Got a Date (Rock It Baby) is in A major at 138.5 beats per minute.

4080120160200

Tempo

139 BPM · Allegromedian of 132 analyses · 138.3–142.6 across the middle eight tenths
Key
A major3 sharps · the key most of the analyses agreed on
Agreement
68%share of analyses that agreed
Analyses
132people who ran the extractor
One beat
433.2milliseconds, 60,000 ÷ BPM
Tuning
434.2Hz · -23 cents from A 440
Dynamics
5.36dB the level wanders from its average
Loudness
0.851Essentia's 0–1 scale, not dB
Danceability
1.376Essentia'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

132 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 68% — put it in A major, a key signature of 3 sharps. The tempo printed above is the median of the 132 readings; 70% of them land within 2% of it, and the middle eight tenths of them run from 138.3 to 142.6 BPM.

At 138.5 BPM one beat lasts 433.2 milliseconds, so a sixteenth note is 108.3 ms and a dotted eighth 324.9 ms — the delay times for this recording. Counted half as fast it is 69.3 BPM, counted twice as fast 277. 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 5.36 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 0.851 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 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 139 BPM

Note valueBeatsMillisecondsHertz
Whole note41732.90.58
Half note2866.41.15
Dotted quarter1.5649.81.54
Quarter note (one beat)1433.22.31
Quarter triplet0.667288.83.46
Dotted eighth0.75324.93.08
Eighth note0.5216.64.62
Eighth triplet0.333144.46.93
Dotted sixteenth0.375162.56.16
Sixteenth note0.25108.39.23
Sixteenth triplet0.16772.213.85
Thirty-second note0.12554.218.47

Half time 69.3 BPM · double time 277 BPM. Every row is one beat (433.2 ms) times the fraction in the second column.

Closest in key and tempo

  1. Eight Days a WeekThe BeatlesA major138BPM
  2. St. JimmyGreen DayA major139BPM
  3. School DaysAC/DCA major139BPM
  4. BirthdayThe BeatlesA major139BPM
  5. The Way We WereBarbra StreisandA major139BPM
  6. I Can’t ExplainThe WhoA major138BPM
  7. PartyBostonA major138BPM
  8. Crazy TrainOzzy OsbourneA major138BPM
  9. Train of Thoughta‐haA major140BPM
  10. Girl Keeps Coming ApartAerosmithA major140BPM

Recordings in A major, ordered by how near their tempo is to 139 BPM. A calculation, not a recommendation.

All songs in A majorAll songs at 139 BPMA major at 130–139 BPM

MusicBrainz collapses 1 recording id into this one. Recording id dd8fa637-bc4f-4666-96d2-8ce1da9662b9.