Alice in Chains · Dirt

Rooster

Rooster is in A flat major at 143.9 beats per minute.

Tempo

144 BPM · Allegromedian of 171 analyses · 143.8–144 across the middle eight tenths

Key: A♭ major4 flats · the key most of the analyses agreed on
Agreement: 100%share of analyses that agreed
Analyses: 171people who ran the extractor
One beat: 417milliseconds, 60,000 ÷ BPM
Tuning: 441.3Hz · +5 cents from A 440
Dynamics: 3.73dB the level wanders from its average
Loudness: 0.718Essentia's 0–1 scale, not dB
Danceability: 1.088Essentia'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

171 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 100% — put it in A flat major, a key signature of 4 flats. The tempo printed above is the median of the 171 readings; 100% of them land within 2% of it, and they barely differ at all.

At 143.9 BPM one beat lasts 417 milliseconds, so a sixteenth note is 104.2 ms and a dotted eighth 312.7 ms — the delay times for this recording. Counted half as fast it is 72 BPM, counted twice as fast 287.8. 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 3.73 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 0.718 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 flat 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 144 BPM

Note value	Beats	Milliseconds	Hertz
Whole note	4	1667.8	0.6
Half note	2	833.9	1.2
Dotted quarter	1.5	625.4	1.6
Quarter note (one beat)	1	417	2.4
Quarter triplet	0.667	278	3.6
Dotted eighth	0.75	312.7	3.2
Eighth note	0.5	208.5	4.8
Eighth triplet	0.333	139	7.2
Dotted sixteenth	0.375	156.4	6.4
Sixteenth note	0.25	104.2	9.59
Sixteenth triplet	0.167	69.5	14.39
Thirty-second note	0.125	52.1	19.19

Half time 72 BPM · double time 287.8 BPM. Every row is one beat (417 ms) times the fraction in the second column.

Closest in key and tempo

Recordings in A flat major, ordered by how near their tempo is to 144 BPM. A calculation, not a recommendation.

All songs in A flat major All songs at 144 BPM A♭ major at 140–149 BPM Alice in Chains

MusicBrainz collapses 25 recording ids into this one. Recording id fb9e081f-d9ae-4a18-8f4a-7f8bfbbac588.