Guns N’ Roses · Appetite for Destruction
Nightrain
Nightrain is in A flat major at 149.3 beats per minute.
Tempo
149 BPM · Allegromedian of 190 analyses · 149.1–150.5 across the middle eight tenths- Key
- A♭ major4 flats · the key most of the analyses agreed on
- Agreement
- 94%share of analyses that agreed
- Analyses
- 190people who ran the extractor
- One beat
- 401.9milliseconds, 60,000 ÷ BPM
- Tuning
- 441Hz · +4 cents from A 440
- Dynamics
- 3.55dB the level wanders from its average
- Loudness
- 0.793Essentia's 0–1 scale, not dB
- Danceability
- 1.252Essentia'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
190 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 94% — put it in A flat major, a key signature of 4 flats. The tempo printed above is the median of the 190 readings; 100% of them land within 2% of it, and the middle eight tenths of them run from 149.1 to 150.5 BPM.
At 149.3 BPM one beat lasts 401.9 milliseconds, so a sixteenth note is 100.5 ms and a dotted eighth 301.4 ms — the delay times for this recording. Counted half as fast it is 74.7 BPM, counted twice as fast 298.6. A score would mark that Allegro, 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 3.55 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 0.793 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 149 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1607.5 | 0.62 |
| Half note | 2 | 803.8 | 1.24 |
| Dotted quarter | 1.5 | 602.8 | 1.66 |
| Quarter note (one beat) | 1 | 401.9 | 2.49 |
| Quarter triplet | 0.667 | 267.9 | 3.73 |
| Dotted eighth | 0.75 | 301.4 | 3.32 |
| Eighth note | 0.5 | 200.9 | 4.98 |
| Eighth triplet | 0.333 | 134 | 7.47 |
| Dotted sixteenth | 0.375 | 150.7 | 6.64 |
| Sixteenth note | 0.25 | 100.5 | 9.95 |
| Sixteenth triplet | 0.167 | 67 | 14.93 |
| Thirty-second note | 0.125 | 50.2 | 19.91 |
Half time 74.7 BPM · double time 298.6 BPM. Every row is one beat (401.9 ms) times the fraction in the second column.
Closest in key and tempo
- Stamina$NotA♭ major149BPM
- “40”U2A♭ major150BPM
- All You WantDidoA♭ major148BPM
- Three Times a LadyCommodoresA♭ major151BPM
- Bold as LoveThe Jimi Hendrix ExperienceA♭ major147BPM
- Anything GoesGuns N’ RosesA♭ major152BPM
- LovelandThe B‐52’sA♭ major152BPM
- How Did I Fall in Love With YouBackstreet BoysA♭ major152BPM
- Bullet the Blue SkyU2A♭ major152BPM
- Brain StewGreen DayA♭ major152BPM
Recordings in A flat major, ordered by how near their tempo is to 149 BPM. A calculation, not a recommendation.
All songs in A flat majorAll songs at 149 BPMA♭ major at 140–149 BPMGuns N’ Roses
MusicBrainz collapses 93 recording ids into this one. Recording id f9cddb0e-68b0-4858-b9be-709adbe4510f.