TempoPeek

The Rolling Stones · Sticky Fingers

Sister Morphine

Sister Morphine is in A minor at 91 beats per minute.

4080120160200

Tempo

91 BPM · Andantemedian of 129 analyses · 90.7–91.1 across the middle eight tenths
Key
A minorno sharps and no flats · the key most of the analyses agreed on
Agreement
74%share of analyses that agreed
Analyses
129people who ran the extractor
One beat
659.3milliseconds, 60,000 ÷ BPM
Tuning
437.7Hz · -9 cents from A 440
Dynamics
6.76dB the level wanders from its average
Loudness
0.364Essentia's 0–1 scale, not dB
Danceability
1.056Essentia'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

129 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 74% — put it in A minor, a key signature of no sharps and no flats. The tempo printed above is the median of the 129 readings; 98% of them land within 2% of it, and they barely differ at all.

At 91 BPM one beat lasts 659.3 milliseconds, so a sixteenth note is 164.8 ms and a dotted eighth 494.5 ms — the delay times for this recording. Counted half as fast it is 45.5 BPM, counted twice as fast 182. A score would mark that Andante, by the ranges this site uses.

The analyses put the reference pitch of the recording at 437.7 Hz, which is 9 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 6.76 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 0.364 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 minor; 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 minor

Each of these differs from A minor 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 91 BPM

Note valueBeatsMillisecondsHertz
Whole note42637.40.38
Half note21318.70.76
Dotted quarter1.59891.01
Quarter note (one beat)1659.31.52
Quarter triplet0.667439.62.28
Dotted eighth0.75494.52.02
Eighth note0.5329.73.03
Eighth triplet0.333219.84.55
Dotted sixteenth0.375247.34.04
Sixteenth note0.25164.86.07
Sixteenth triplet0.167109.99.1
Thirty-second note0.12582.412.13

Half time 45.5 BPM · double time 182 BPM. Every row is one beat (659.3 ms) times the fraction in the second column.

Closest in key and tempo

  1. Gotta Love ItAerosmithA minor91BPM
  2. SlideDidoA minor91BPM
  3. One for the RoadArctic MonkeysA minor91BPM
  4. SchoolSupertrampA minor90BPM
  5. War Pigs / Luke’s WallBlack SabbathA minor90BPM
  6. The LovecatsThe CureA minor92BPM
  7. Put Out the FireQueenA minor92BPM
  8. Can’t StopRed Hot Chili PeppersA minor92BPM
  9. Fight Fire With FireMetallicaA minor90BPM
  10. Good Life2Pac featuring Big Syke & E.D.I of the OUTLAWZA minor90BPM

Recordings in A minor, ordered by how near their tempo is to 91 BPM. A calculation, not a recommendation.

All songs in A minorAll songs at 91 BPMA minor at 90–99 BPMThe Rolling Stones

MusicBrainz collapses 60 recording ids into this one. Recording id 0b22e79f-ec68-41d7-af4d-2778c8cc0668.