Jay‐Z · The Black Album

99 Problems

99 Problems is in B flat major at 93.3 beats per minute.

Tempo

93 BPM · Andantemedian of 138 analyses · 93.2–94.6 across the middle eight tenths

Key: B♭ major2 flats · the key most of the analyses agreed on
Agreement: 75%share of analyses that agreed
Analyses: 138people who ran the extractor
One beat: 643.1milliseconds, 60,000 ÷ BPM
Tuning: 434.2Hz · -23 cents from A 440
Dynamics: 2.52dB the level wanders from its average
Loudness: 0.939Essentia's 0–1 scale, not dB
Danceability: 1.184Essentia'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

138 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 75% — put it in B flat major, a key signature of 2 flats. The tempo printed above is the median of the 138 readings; 91% of them land within 2% of it, and the middle eight tenths of them run from 93.2 to 94.6 BPM.

At 93.3 BPM one beat lasts 643.1 milliseconds, so a sixteenth note is 160.8 ms and a dotted eighth 482.3 ms — the delay times for this recording. Counted half as fast it is 46.7 BPM, counted twice as fast 186.6. A score would mark that Andante, by the ranges this site uses.

The analyses put the reference pitch of the recording at 434.2 Hz, which is 23 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 2.52 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 0.939 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 B 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 B♭ major

Each of these differs from B♭ 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 93 BPM

Note value	Beats	Milliseconds	Hertz
Whole note	4	2572.3	0.39
Half note	2	1286.2	0.78
Dotted quarter	1.5	964.6	1.04
Quarter note (one beat)	1	643.1	1.56
Quarter triplet	0.667	428.7	2.33
Dotted eighth	0.75	482.3	2.07
Eighth note	0.5	321.5	3.11
Eighth triplet	0.333	214.4	4.67
Dotted sixteenth	0.375	241.2	4.15
Sixteenth note	0.25	160.8	6.22
Sixteenth triplet	0.167	107.2	9.33
Thirty-second note	0.125	80.4	12.44

Half time 46.7 BPM · double time 186.6 BPM. Every row is one beat (643.1 ms) times the fraction in the second column.

Closest in key and tempo

Recordings in B flat major, ordered by how near their tempo is to 93 BPM. A calculation, not a recommendation.

All songs in B flat major All songs at 93 BPM B♭ major at 90–99 BPM Jay‐Z

MusicBrainz collapses 29 recording ids into this one. Recording id 9d8d5c34-308a-4432-8ddd-9bd3d2444b94.