Katy Perry · PRISM

Roar

Roar is in E flat major at 90 beats per minute.

Tempo

90 BPM · Andantemedian of 153 analyses · 89.9–90.1 across the middle eight tenths

Key: E♭ major3 flats · the key most of the analyses agreed on
Agreement: 58%share of analyses that agreed
Analyses: 153people who ran the extractor
One beat: 666.7milliseconds, 60,000 ÷ BPM
Tuning: 436.5Hz · -14 cents from A 440
Dynamics: 3.64dB the level wanders from its average
Loudness: 0.875Essentia's 0–1 scale, not dB
Danceability: 1.045Essentia'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

153 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 58% — put it in E flat major, a key signature of 3 flats. The tempo printed above is the median of the 153 readings; 99% of them land within 2% of it, and they barely differ at all.

At 90 BPM one beat lasts 666.7 milliseconds, so a sixteenth note is 166.7 ms and a dotted eighth 500 ms — the delay times for this recording. Counted half as fast it is 45 BPM, counted twice as fast 180. A score would mark that Andante, by the ranges this site uses.

The analyses put the reference pitch of the recording at 436.5 Hz, which is 14 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 3.64 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 0.875 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 E 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 E♭ major

Each of these differs from E♭ 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 90 BPM

Note value	Beats	Milliseconds	Hertz
Whole note	4	2666.7	0.38
Half note	2	1333.3	0.75
Dotted quarter	1.5	1000	1
Quarter note (one beat)	1	666.7	1.5
Quarter triplet	0.667	444.4	2.25
Dotted eighth	0.75	500	2
Eighth note	0.5	333.3	3
Eighth triplet	0.333	222.2	4.5
Dotted sixteenth	0.375	250	4
Sixteenth note	0.25	166.7	6
Sixteenth triplet	0.167	111.1	9
Thirty-second note	0.125	83.3	12

Half time 45 BPM · double time 180 BPM. Every row is one beat (666.7 ms) times the fraction in the second column.

Closest in key and tempo

Recordings in E flat major, ordered by how near their tempo is to 90 BPM. A calculation, not a recommendation.

All songs in E flat major All songs at 90 BPM E♭ major at 90–99 BPM Katy Perry

MusicBrainz collapses 8 recording ids into this one. Recording id 3cb1a5a0-2a10-4bf5-96fb-7211703936ed.