Sigur Rós · Ágætis byrjun
Viðrar vel til loftárása
Viðrar vel til loftárása is in A major at 162.8 beats per minute.
Tempo
163 BPM · Vivacemedian of 129 analyses · 162.7–162.9 across the middle eight tenths- Key
- A major3 sharps · the key most of the analyses agreed on
- Agreement
- 98%share of analyses that agreed
- Analyses
- 129people who ran the extractor
- One beat
- 368.6milliseconds, 60,000 ÷ BPM
- Tuning
- 441Hz · +4 cents from A 440
- Dynamics
- 7.62dB the level wanders from its average
- Loudness
- 0.578Essentia's 0–1 scale, not dB
- Danceability
- 0.925Essentia'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. All but a handful of them — 98% — put it in A major, a key signature of 3 sharps. 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 162.8 BPM one beat lasts 368.6 milliseconds, so a sixteenth note is 92.1 ms and a dotted eighth 276.4 ms — the delay times for this recording. Counted half as fast it is 81.4 BPM, counted twice as fast 325.6. A score would mark that Vivace, by the ranges this site uses.
The analyses put the reference pitch of the recording at 441 Hz, which is 4 cents above concert A at 440 Hz — close enough to standard that a tuner would not argue. That is a fact about this transfer of the music, not about how it was played.
The dynamic complexity of the recording measures 7.62 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 0.578 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 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 163 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1474.2 | 0.68 |
| Half note | 2 | 737.1 | 1.36 |
| Dotted quarter | 1.5 | 552.8 | 1.81 |
| Quarter note (one beat) | 1 | 368.6 | 2.71 |
| Quarter triplet | 0.667 | 245.7 | 4.07 |
| Dotted eighth | 0.75 | 276.4 | 3.62 |
| Eighth note | 0.5 | 184.3 | 5.43 |
| Eighth triplet | 0.333 | 122.9 | 8.14 |
| Dotted sixteenth | 0.375 | 138.2 | 7.24 |
| Sixteenth note | 0.25 | 92.1 | 10.85 |
| Sixteenth triplet | 0.167 | 61.4 | 16.28 |
| Thirty-second note | 0.125 | 46.1 | 21.71 |
Half time 81.4 BPM · double time 325.6 BPM. Every row is one beat (368.6 ms) times the fraction in the second column.
Closest in key and tempo
- The Girl Is MineMichael Jackson with Paul McCartneyA major163BPM
- Trapped Under IceMetallicaA major163BPM
- Soul OneBlind MelonA major163BPM
- M+M’sblink‐182A major163BPM
- ParanoidBlack SabbathA major163BPM
- Rip It UpJetA major164BPM
- WheelsFoo FightersA major162BPM
- Doctor RobertThe BeatlesA major164BPM
- Come Live With Me AngelMarvin GayeA major162BPM
- Black DogLed ZeppelinA major164BPM
Recordings in A major, ordered by how near their tempo is to 163 BPM. A calculation, not a recommendation.
All songs in A majorAll songs at 163 BPMA major at 160–169 BPM
MusicBrainz collapses 21 recording ids into this one. Recording id 8cf770ff-b93a-48b4-ba04-cb437bc52d36.