TempoPeek

Pink Floyd · A Saucerful of Secrets

Let There Be More Light

Let There Be More Light is in C major at 154.7 beats per minute.

4080120160200

Tempo

155 BPM · Allegromedian of 143 analyses · 154.5–155 across the middle eight tenths
Key
C majorno sharps and no flats · the key most of the analyses agreed on
Agreement
65%share of analyses that agreed
Analyses
143people who ran the extractor
One beat
387.8milliseconds, 60,000 ÷ BPM
Tuning
441.3Hz · +5 cents from A 440
Dynamics
3.94dB the level wanders from its average
Loudness
0.748Essentia's 0–1 scale, not dB
Danceability
0.94Essentia'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

143 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 65% — put it in C major, a key signature of no sharps and no flats. The tempo printed above is the median of the 143 readings; 88% of them land within 2% of it, and they barely differ at all.

At 154.7 BPM one beat lasts 387.8 milliseconds, so a sixteenth note is 97 ms and a dotted eighth 290.9 ms — the delay times for this recording. Counted half as fast it is 77.4 BPM, counted twice as fast 309.4. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 441.3 Hz, which is 5 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 3.94 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 0.748 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 C 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 C major

Each of these differs from C 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 155 BPM

Note valueBeatsMillisecondsHertz
Whole note41551.40.64
Half note2775.71.29
Dotted quarter1.5581.81.72
Quarter note (one beat)1387.82.58
Quarter triplet0.667258.63.87
Dotted eighth0.75290.93.44
Eighth note0.5193.95.16
Eighth triplet0.333129.37.74
Dotted sixteenth0.375145.46.88
Sixteenth note0.259710.31
Sixteenth triplet0.16764.615.47
Thirty-second note0.12548.520.63

Half time 77.4 BPM · double time 309.4 BPM. Every row is one beat (387.8 ms) times the fraction in the second column.

Closest in key and tempo

  1. Santa Claus Is Coming to TownThe CrystalsC major155BPM
  2. So LonelyThe PoliceC major155BPM
  3. Rock ’n’ Roll With MeDavid BowieC major154BPM
  4. The Nearness of YouNorah JonesC major154BPM
  5. HeroinThe Velvet Underground & NicoC major154BPM
  6. Bringin’ On the HeartbreakDef LeppardC major155BPM
  7. ChangeLana Del ReyC major155BPM
  8. Walk – Don’t RunThe VenturesC major155BPM
  9. Show MeBruno MarsC major155BPM
  10. Play the GameQueenC major155BPM

Recordings in C major, ordered by how near their tempo is to 155 BPM. A calculation, not a recommendation.

All songs in C majorAll songs at 155 BPMC major at 150–159 BPMPink Floyd

MusicBrainz collapses 32 recording ids into this one. Recording id daaa9828-702a-4e14-8f3f-af9f24171c52.