Beyoncé · I Am… Sasha Fierce
Sweet Dreams
Sweet Dreams is in D flat major at 121.9 beats per minute.
Tempo
122 BPM · Allegromedian of 237 analyses · 121.9–122 across the middle eight tenths- Key
- D♭ major5 flats · the key most of the analyses agreed on
- Agreement
- 93%share of analyses that agreed
- Analyses
- 237people who ran the extractor
- One beat
- 492.2milliseconds, 60,000 ÷ BPM
- Tuning
- 434.2Hz · -23 cents from A 440
- Dynamics
- 4.46dB the level wanders from its average
- Loudness
- 0.757Essentia's 0–1 scale, not dB
- Danceability
- 1.148Essentia'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
237 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 93% — put it in D flat major, a key signature of 5 flats. The tempo printed above is the median of the 237 readings; 98% of them land within 2% of it, and they barely differ at all.
At 121.9 BPM one beat lasts 492.2 milliseconds, so a sixteenth note is 123.1 ms and a dotted eighth 369.2 ms — the delay times for this recording. Counted half as fast it is 61 BPM, counted twice as fast 243.8. 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 4.46 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 0.757 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 D 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 D♭ major
Each of these differs from D♭ 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 122 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1968.8 | 0.51 |
| Half note | 2 | 984.4 | 1.02 |
| Dotted quarter | 1.5 | 738.3 | 1.35 |
| Quarter note (one beat) | 1 | 492.2 | 2.03 |
| Quarter triplet | 0.667 | 328.1 | 3.05 |
| Dotted eighth | 0.75 | 369.2 | 2.71 |
| Eighth note | 0.5 | 246.1 | 4.06 |
| Eighth triplet | 0.333 | 164.1 | 6.1 |
| Dotted sixteenth | 0.375 | 184.6 | 5.42 |
| Sixteenth note | 0.25 | 123.1 | 8.13 |
| Sixteenth triplet | 0.167 | 82 | 12.19 |
| Thirty-second note | 0.125 | 61.5 | 16.25 |
Half time 61 BPM · double time 243.8 BPM. Every row is one beat (492.2 ms) times the fraction in the second column.
Closest in key and tempo
- Joe the LionDavid BowieD♭ major122BPM
- Please, Mrs. HenryBob Dylan & The BandD♭ major123BPM
- Eenie MeenieJustin Bieber & Sean KingstonD♭ major121BPM
- SacredDepeche ModeD♭ major121BPM
- The Ballad of Me and My BrainThe 1975D♭ major123BPM
- Little Red CorvettePrinceD♭ major123BPM
- My HumpsThe Black Eyed PeasD♭ major123BPM
- You Are So BeautifulJoe CockerD♭ major123BPM
- Walk AwayBlack SabbathD♭ major120BPM
- Love Hungry ManAC/DCD♭ major120BPM
Recordings in D flat major, ordered by how near their tempo is to 122 BPM. A calculation, not a recommendation.
All songs in D flat majorAll songs at 122 BPMD♭ major at 120–129 BPMBeyoncé
MusicBrainz collapses 3 recording ids into this one. Recording id aecba9b4-7d70-4ee0-938f-f26ff85fd5fa.