TempoPeek

AC/DC · For Those About to Rock (We Salute You)

Night of the Long Knives

Night of the Long Knives is in G major at 98.9 beats per minute.

4080120160200

Tempo

99 BPM · Andantemedian of 147 analyses · 98.9–99 across the middle eight tenths
Key
G major1 sharp · the key most of the analyses agreed on
Agreement
94%share of analyses that agreed
Analyses
147people who ran the extractor
One beat
606.7milliseconds, 60,000 ÷ BPM
Tuning
441.8Hz · +7 cents from A 440
Dynamics
2.18dB the level wanders from its average
Loudness
0.953Essentia's 0–1 scale, not dB
Danceability
1.369Essentia'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

147 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 94% — put it in G major, a key signature of 1 sharp. The tempo printed above is the median of the 147 readings; 98% of them land within 2% of it, and they barely differ at all.

At 98.9 BPM one beat lasts 606.7 milliseconds, so a sixteenth note is 151.7 ms and a dotted eighth 455 ms — the delay times for this recording. Counted half as fast it is 49.5 BPM, counted twice as fast 197.8. A score would mark that Andante, by the ranges this site uses.

The analyses put the reference pitch of the recording at 441.8 Hz, which is 7 cents above 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 2.18 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 0.953 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 G 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 G major

Each of these differs from G 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 99 BPM

Note valueBeatsMillisecondsHertz
Whole note42426.70.41
Half note21213.30.82
Dotted quarter1.59101.1
Quarter note (one beat)1606.71.65
Quarter triplet0.667404.42.47
Dotted eighth0.754552.2
Eighth note0.5303.33.3
Eighth triplet0.333202.24.95
Dotted sixteenth0.375227.54.4
Sixteenth note0.25151.76.59
Sixteenth triplet0.167101.19.89
Thirty-second note0.12575.813.19

Half time 49.5 BPM · double time 197.8 BPM. Every row is one beat (606.7 ms) times the fraction in the second column.

Closest in key and tempo

  1. Bad to the BoneGeorge Thorogood & the DestroyersG major99BPM
  2. Over the Hills and Far AwayLed ZeppelinG major99BPM
  3. It’s All Over NowThe Rolling StonesG major99BPM
  4. Mary JaneAlanis MorissetteG major99BPM
  5. Tired of Being AloneAl GreenG major98BPM
  6. White CityThe PoguesG major98BPM
  7. Best for LastAdeleG major100BPM
  8. HaïtiArcade FireG major100BPM
  9. On the Turning AwayPink FloydG major100BPM
  10. If This Is ItHuey Lewis and the NewsG major98BPM

Recordings in G major, ordered by how near their tempo is to 99 BPM. A calculation, not a recommendation.

All songs in G majorAll songs at 99 BPMG major at 90–99 BPMAC/DC

MusicBrainz collapses 3 recording ids into this one. Recording id f0a9bf8a-a8e4-4c63-af9c-fc747a5a09ba.