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Error404

Error404 is in B flat minor at 120 beats per minute.

Tempo

120 BPM · Allegromedian of 197 analyses · 120–120 across the middle eight tenths

Key: B♭ minor5 flats · the key most of the analyses agreed on
Agreement: 100%share of analyses that agreed
Analyses: 197people who ran the extractor
One beat: 500milliseconds, 60,000 ÷ BPM
Tuning: 434.2Hz · -23 cents from A 440
Dynamics: 3.61dB the level wanders from its average
Loudness: 0.93Essentia's 0–1 scale, not dB
Danceability: 1.513Essentia'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

197 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 100% — put it in B flat minor, a key signature of 5 flats. The tempo printed above is the median of the 197 readings; 100% of them land within 2% of it, and they barely differ at all.

At 120 BPM one beat lasts 500 milliseconds, so a sixteenth note is 125 ms and a dotted eighth 375 ms — the delay times for this recording. Counted half as fast it is 60 BPM, counted twice as fast 240. A score would mark that Allegro, 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 3.61 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 0.93 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 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 B♭ minor

Each of these differs from B♭ 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 120 BPM

Note value	Beats	Milliseconds	Hertz
Whole note	4	2000	0.5
Half note	2	1000	1
Dotted quarter	1.5	750	1.33
Quarter note (one beat)	1	500	2
Quarter triplet	0.667	333.3	3
Dotted eighth	0.75	375	2.67
Eighth note	0.5	250	4
Eighth triplet	0.333	166.7	6
Dotted sixteenth	0.375	187.5	5.33
Sixteenth note	0.25	125	8
Sixteenth triplet	0.167	83.3	12
Thirty-second note	0.125	62.5	16

Half time 60 BPM · double time 240 BPM. Every row is one beat (500 ms) times the fraction in the second column.

Closest in key and tempo

Recordings in B flat minor, ordered by how near their tempo is to 120 BPM. A calculation, not a recommendation.

All songs in B flat minor All songs at 120 BPM B♭ minor at 120–129 BPM Apparat

MusicBrainz collapses 1 recording id into this one. Recording id 98cbd9d8-eb04-44e2-8582-d7f8ce250b2f.