TempoPeek

AC/DC · Fly on the Wall

Fly on the Wall

Fly on the Wall is in D major at 126.5 beats per minute.

4080120160200

Tempo

127 BPM · Allegromedian of 169 analyses · 126.4–129.5 across the middle eight tenths
Key
D major2 sharps · the key most of the analyses agreed on
Agreement
92%share of analyses that agreed
Analyses
169people who ran the extractor
One beat
474.3milliseconds, 60,000 ÷ BPM
Tuning
442.8Hz · +11 cents from A 440
Dynamics
2.76dB the level wanders from its average
Loudness
0.945Essentia's 0–1 scale, not dB
Danceability
1.21Essentia'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

169 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 92% — put it in D major, a key signature of 2 sharps. The tempo printed above is the median of the 169 readings; 89% of them land within 2% of it, and the middle eight tenths of them run from 126.4 to 129.5 BPM.

At 126.5 BPM one beat lasts 474.3 milliseconds, so a sixteenth note is 118.6 ms and a dotted eighth 355.7 ms — the delay times for this recording. Counted half as fast it is 63.3 BPM, counted twice as fast 253. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 442.8 Hz, which is 11 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 2.76 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 0.945 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 D 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 D major

Each of these differs from D 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 127 BPM

Note valueBeatsMillisecondsHertz
Whole note41897.20.53
Half note2948.61.05
Dotted quarter1.5711.51.41
Quarter note (one beat)1474.32.11
Quarter triplet0.667316.23.16
Dotted eighth0.75355.72.81
Eighth note0.5237.24.22
Eighth triplet0.333158.16.33
Dotted sixteenth0.375177.95.62
Sixteenth note0.25118.68.43
Sixteenth triplet0.16779.112.65
Thirty-second note0.12559.316.87

Half time 63.3 BPM · double time 253 BPM. Every row is one beat (474.3 ms) times the fraction in the second column.

Closest in key and tempo

  1. Summer WindMichael BubléD major127BPM
  2. People Get ReadyAretha FranklinD major127BPM
  3. (Da Le) YaleoSantanaD major127BPM
  4. Dude (Looks Like a Lady)AerosmithD major126BPM
  5. Hey Boy Hey GirlThe Chemical BrothersD major127BPM
  6. When All Is Said and DoneABBAD major126BPM
  7. There’s Gonna Be Some Rockin’AC/DCD major127BPM
  8. All This TimeStingD major127BPM
  9. Under My ThumbThe Rolling StonesD major127BPM
  10. She Goes DownMötley CrüeD major127BPM

Recordings in D major, ordered by how near their tempo is to 127 BPM. A calculation, not a recommendation.

All songs in D majorAll songs at 127 BPMD major at 120–129 BPMAC/DC

MusicBrainz collapses 18 recording ids into this one. Recording id 5b6a715b-8ea6-48af-82e2-63614d0646d7.