TempoPeek

Led Zeppelin · Physical Graffiti

In the Light

In the Light is in A major at 126.8 beats per minute.

4080120160200

Tempo

127 BPM · Allegromedian of 205 analyses · 126.8–126.9 across the middle eight tenths
Key
A major3 sharps · the key most of the analyses agreed on
Agreement
92%share of analyses that agreed
Analyses
205people who ran the extractor
One beat
473.2milliseconds, 60,000 ÷ BPM
Tuning
435.4Hz · -18 cents from A 440
Dynamics
6.41dB the level wanders from its average
Loudness
0.065Essentia's 0–1 scale, not dB
Danceability
0.99Essentia'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

205 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 92% — put it in A major, a key signature of 3 sharps. The tempo printed above is the median of the 205 readings; 100% of them land within 2% of it, and they barely differ at all.

At 126.8 BPM one beat lasts 473.2 milliseconds, so a sixteenth note is 118.3 ms and a dotted eighth 354.9 ms — the delay times for this recording. Counted half as fast it is 63.4 BPM, counted twice as fast 253.6. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 435.4 Hz, which is 18 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 6.41 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 0.065 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 127 BPM

Note valueBeatsMillisecondsHertz
Whole note41892.70.53
Half note2946.41.06
Dotted quarter1.5709.81.41
Quarter note (one beat)1473.22.11
Quarter triplet0.667315.53.17
Dotted eighth0.75354.92.82
Eighth note0.5236.64.23
Eighth triplet0.333157.76.34
Dotted sixteenth0.375177.45.64
Sixteenth note0.25118.38.45
Sixteenth triplet0.16778.912.68
Thirty-second note0.12559.116.91

Half time 63.4 BPM · double time 253.6 BPM. Every row is one beat (473.2 ms) times the fraction in the second column.

Closest in key and tempo

  1. I Want to Tell YouThe BeatlesA major127BPM
  2. Truckin’Grateful DeadA major127BPM
  3. Love Isn’t Easy (but It Sure Is Hard Enough)ABBAA major127BPM
  4. Take On Me (MTV Unplugged)a‐haA major127BPM
  5. Aerodynamic Beats / Forget About the WorldDaft Punk / GabrielleA major127BPM
  6. PompeiiBastilleA major127BPM
  7. Yoü and ILady GagaA major127BPM
  8. Wasted WordsThe Allman Brothers BandA major127BPM
  9. SeptemberEarth, Wind & FireA major126BPM
  10. Sweet Home ChicagoBlues BrothersA major126BPM

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

All songs in A majorAll songs at 127 BPMA major at 120–129 BPMLed Zeppelin

MusicBrainz collapses 9 recording ids into this one. Recording id 19595942-7585-4172-8997-c77568161383.