TempoPeek

AC/DC · Back in Black

Back in Black

Back in Black is in A major at 93.3 beats per minute.

4080120160200

Tempo

93 BPM · Andantemedian of 387 analyses · 93.2–94.4 across the middle eight tenths
Key
A major3 sharps · the key most of the analyses agreed on
Agreement
97%share of analyses that agreed
Analyses
387people who ran the extractor
One beat
643.1milliseconds, 60,000 ÷ BPM
Tuning
440Hz · 0 cents from A 440
Dynamics
5.13dB the level wanders from its average
Loudness
0.876Essentia's 0–1 scale, not dB
Danceability
1.297Essentia'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

387 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 97% — put it in A major, a key signature of 3 sharps. The tempo printed above is the median of the 387 readings; 97% of them land within 2% of it, and the middle eight tenths of them run from 93.2 to 94.4 BPM.

At 93.3 BPM one beat lasts 643.1 milliseconds, so a sixteenth note is 160.8 ms and a dotted eighth 482.3 ms — the delay times for this recording. Counted half as fast it is 46.7 BPM, counted twice as fast 186.6. A score would mark that Andante, by the ranges this site uses.

The analyses put the reference pitch of the recording at 440 Hz, which is 0 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 5.13 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 0.876 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 93 BPM

Note valueBeatsMillisecondsHertz
Whole note42572.30.39
Half note21286.20.78
Dotted quarter1.5964.61.04
Quarter note (one beat)1643.11.56
Quarter triplet0.667428.72.33
Dotted eighth0.75482.32.07
Eighth note0.5321.53.11
Eighth triplet0.333214.44.67
Dotted sixteenth0.375241.24.15
Sixteenth note0.25160.86.22
Sixteenth triplet0.167107.29.33
Thirty-second note0.12580.412.44

Half time 46.7 BPM · double time 186.6 BPM. Every row is one beat (643.1 ms) times the fraction in the second column.

Closest in key and tempo

  1. Out on the TilesLed ZeppelinA major93BPM
  2. No Way BackFoo FightersA major93BPM
  3. MagicColdplayA major94BPM
  4. Somebody Up There Likes MeDavid BowieA major93BPM
  5. That’s the Way It IsCéline DionA major93BPM
  6. Friday on My MindDavid BowieA major94BPM
  7. AirplanesB.o.B feat. Hayley Williams of ParamoreA major93BPM
  8. Weather With YouCrowded HouseA major94BPM
  9. I Want You to Want MeCheap TrickA major93BPM
  10. Little Red RoosterSam CookeA major93BPM

Recordings in A major, ordered by how near their tempo is to 93 BPM. A calculation, not a recommendation.

All songs in A majorAll songs at 93 BPMA major at 90–99 BPMAC/DC

MusicBrainz collapses 152 recording ids into this one. Recording id ef71afb6-5e51-41df-999b-9e7c7306063a.