TempoPeek

Backstreet Boys · Unbreakable

Unsuspecting Sunday Afternoon

Unsuspecting Sunday Afternoon is in C major at 147.9 beats per minute.

4080120160200

Tempo

148 BPM · Allegromedian of 159 analyses · 147.7–147.9 across the middle eight tenths
Key
C majorno sharps and no flats · the key most of the analyses agreed on
Agreement
77%share of analyses that agreed
Analyses
159people who ran the extractor
One beat
405.7milliseconds, 60,000 ÷ BPM
Tuning
440.3Hz · +1 cents from A 440
Dynamics
4.05dB the level wanders from its average
Loudness
0.811Essentia's 0–1 scale, not dB
Danceability
0.951Essentia'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

159 independent analyses of this recording were submitted to AcousticBrainz. Most of them — 77% — put it in C major, a key signature of no sharps and no flats. The tempo printed above is the median of the 159 readings; 100% of them land within 2% of it, and they barely differ at all.

At 147.9 BPM one beat lasts 405.7 milliseconds, so a sixteenth note is 101.4 ms and a dotted eighth 304.3 ms — the delay times for this recording. Counted half as fast it is 74 BPM, counted twice as fast 295.8. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 440.3 Hz, which is 1 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 4.05 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 0.811 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 C 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 C major

Each of these differs from C 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 148 BPM

Note valueBeatsMillisecondsHertz
Whole note41622.70.62
Half note2811.41.23
Dotted quarter1.5608.51.64
Quarter note (one beat)1405.72.47
Quarter triplet0.667270.53.7
Dotted eighth0.75304.33.29
Eighth note0.5202.84.93
Eighth triplet0.333135.27.4
Dotted sixteenth0.375152.16.57
Sixteenth note0.25101.49.86
Sixteenth triplet0.16767.614.79
Thirty-second note0.12550.719.72

Half time 74 BPM · double time 295.8 BPM. Every row is one beat (405.7 ms) times the fraction in the second column.

Closest in key and tempo

  1. I Looked at YouThe DoorsC major148BPM
  2. DissidentPearl JamC major148BPM
  3. All the Small Thingsblink‐182C major148BPM
  4. I’m Loving Every Moment With YouCéline DionC major148BPM
  5. My SharonaThe KnackC major148BPM
  6. Fat Old SunPink FloydC major148BPM
  7. TimeDavid BowieC major148BPM
  8. Splish SplashBobby DarinC major148BPM
  9. Don’t CryAsiaC major148BPM
  10. The Long Black VeilJohnny CashC major148BPM

Recordings in C major, ordered by how near their tempo is to 148 BPM. A calculation, not a recommendation.

All songs in C majorAll songs at 148 BPMC major at 140–149 BPMBackstreet Boys

MusicBrainz collapses 1 recording id into this one. Recording id dabe685b-aa53-43fe-8610-836a68c7492f.