TempoPeek

Tony Bennett · I Left My Heart in San Francisco

I Left My Heart in San Francisco

I Left My Heart in San Francisco is in B major at 129 beats per minute.

4080120160200

Tempo

129 BPM · Allegromedian of 176 analyses · 125.5–135.4 across the middle eight tenths
Key
B major5 sharps · the key most of the analyses agreed on
Agreement
56%share of analyses that agreed
Analyses
176people who ran the extractor
One beat
465.1milliseconds, 60,000 ÷ BPM
Tuning
446.4Hz · +25 cents from A 440
Dynamics
6.79dB the level wanders from its average
Loudness
0.507Essentia's 0–1 scale, not dB
Danceability
0.819Essentia'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

176 independent analyses of this recording were submitted to AcousticBrainz. A bare majority of them — 56% — put it in B major, a key signature of 5 sharps. The tempo printed above is the median of the 176 readings; 38% of them land within 2% of it, and the middle eight tenths of them run from 125.5 to 135.4 BPM.

At 129 BPM one beat lasts 465.1 milliseconds, so a sixteenth note is 116.3 ms and a dotted eighth 348.8 ms — the delay times for this recording. Counted half as fast it is 64.5 BPM, counted twice as fast 258. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 446.4 Hz, which is 25 cents above 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 6.79 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 0.507 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 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 B major

Each of these differs from B 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 129 BPM

Note valueBeatsMillisecondsHertz
Whole note41860.50.54
Half note2930.21.08
Dotted quarter1.5697.71.43
Quarter note (one beat)1465.12.15
Quarter triplet0.667310.13.23
Dotted eighth0.75348.82.87
Eighth note0.5232.64.3
Eighth triplet0.3331556.45
Dotted sixteenth0.375174.45.73
Sixteenth note0.25116.38.6
Sixteenth triplet0.16777.512.9
Thirty-second note0.12558.117.2

Half time 64.5 BPM · double time 258 BPM. Every row is one beat (465.1 ms) times the fraction in the second column.

Closest in key and tempo

  1. Get the Party StartedP!nkB major129BPM
  2. FaithfullyJourneyB major129BPM
  3. Wonderful WorldSam CookeB major129BPM
  4. Street Fighting ManThe Rolling StonesB major128BPM
  5. TimberPitbull feat. Ke$haB major130BPM
  6. Rockin to the BeatThe Black Eyed PeasB major128BPM
  7. Know Your EnemyGreen DayB major130BPM
  8. YouGalantisB major128BPM
  9. Pretty HurtsBeyoncéB major130BPM
  10. Surrounded by Heads and BodiesThe 1975B major128BPM

Recordings in B major, ordered by how near their tempo is to 129 BPM. A calculation, not a recommendation.

All songs in B majorAll songs at 129 BPMB major at 120–129 BPM

MusicBrainz collapses 49 recording ids into this one. Recording id 40861b98-331e-408c-984e-25a8c35fbc63.