Pat Benatar · In the Heat of the Night

Heartbreaker

Heartbreaker is in F minor at 155 beats per minute.

Tempo

155 BPM · Allegromedian of 241 analyses · 154.9–155.3 across the middle eight tenths

Key: F minor4 flats · the key most of the analyses agreed on
Agreement: 99%share of analyses that agreed
Analyses: 241people who ran the extractor
One beat: 387.1milliseconds, 60,000 ÷ BPM
Tuning: 444.9Hz · +19 cents from A 440
Dynamics: 2.95dB the level wanders from its average
Loudness: 0.934Essentia's 0–1 scale, not dB
Danceability: 1.123Essentia'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

241 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 99% — put it in F minor, a key signature of 4 flats. The tempo printed above is the median of the 241 readings; 100% of them land within 2% of it, and they barely differ at all.

At 155 BPM one beat lasts 387.1 milliseconds, so a sixteenth note is 96.8 ms and a dotted eighth 290.3 ms — the delay times for this recording. Counted half as fast it is 77.5 BPM, counted twice as fast 310. A score would mark that Allegro, by the ranges this site uses.

The analyses put the reference pitch of the recording at 444.9 Hz, which is 19 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 2.95 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 0.934 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 F minor; 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 F minor

Each of these differs from F minor 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 155 BPM

Note value	Beats	Milliseconds	Hertz
Whole note	4	1548.4	0.65
Half note	2	774.2	1.29
Dotted quarter	1.5	580.6	1.72
Quarter note (one beat)	1	387.1	2.58
Quarter triplet	0.667	258.1	3.88
Dotted eighth	0.75	290.3	3.44
Eighth note	0.5	193.5	5.17
Eighth triplet	0.333	129	7.75
Dotted sixteenth	0.375	145.2	6.89
Sixteenth note	0.25	96.8	10.33
Sixteenth triplet	0.167	64.5	15.5
Thirty-second note	0.125	48.4	20.67

Half time 77.5 BPM · double time 310 BPM. Every row is one beat (387.1 ms) times the fraction in the second column.

The same title by somebody else

HeartbreakerLed ZeppelinA minor97BPM

Matched on the title alone, so this list can hold a different song that happens to share a name. Nothing here claims one is a cover of the other.

Closest in key and tempo

Recordings in F minor, ordered by how near their tempo is to 155 BPM. A calculation, not a recommendation.

All songs in F minor All songs at 155 BPM F minor at 150–159 BPM Pat Benatar

MusicBrainz collapses 42 recording ids into this one. Recording id ed77dce5-fe7e-4fa1-bb38-4768c9ba7a2b.