Atmos Bubble and boom! Index measured, not opinion

Back to Black (2024)

DEMO 2.8 · BUBBLE 3.2 · BOOM 2.5 (with BEQ 5.5). Bass measured on the disc, DD+ / Atmos. Directed by Sam Taylor-Johnson. Music, Drama.

Back to Black (2024) poster
Front
50%
L48%
51%
R48%
100%
C82%
LFE
6%
LFE15%
Surround
15%
Ls29%
15%
Rs28%
7%
Lrs17%
8%
Rrs17%
Wide
0%
Lw0%
0%
Rw0%
Height
0%
Ltf0%
0%
Rtf0%
4%
Ltm8%
3%
Rtm8%
off
Ltr 
off
Rtr 

Bar and top figure — level against the film’s most active channel. Bottom figure — share of the runtime the channel carries signal.

DEMO
2.8 / 10
Bubble
3.2 / 10
Boom, as released
2.5 / 10
Boom with BEQ
5.5 / 10
Measured release
Disc · DD+ / Atmos · chart by kaelaria
Deep bass peak, 10–30 Hz
-43.2 dBFS · with BEQ -31.4
Depth, 10–20 vs 30–60 Hz
-13.3 dB · with BEQ +3.8
Average level, 10–30 Hz
-68.4 dBFS · with BEQ -56.6
Minutes of deep bass
0 min · with BEQ 3 min at ≥ −30 dBFS
Filtered release
its BEQ restores up to 24.2 dB at 10–20 Hz
Tomatometer
35% · as of 11 Jan 2026
Metascore
43 / 100 · as of 11 Jan 2026
Chart scale read
-20 to -99.5 dBFS
Height uptime
2.6%
LFE uptime
14.5% (shown, not scored)
Dynamic range
28.3 dB
Channels used
14 of 16
Dead channels
Ltr Rtr
Genres
Music, Drama
Tags
biographical, drama, musical
Audio
DD+, Atmos
Released
11 Apr 2024
First listed
27 May 2024
Sources
PerceptualPro + BEQ
Render
current

Channel by channel, through the film

One lane per speaker, the whole film from left to right. Bar height is how loud that speaker gets (square-root scale against this film's loudest moment, so quiet passages stay visible). The amber line under a lane marks the moments counted as playing, and the figure on the right is their share of the film. For the six height speakers that share is part of BUBBLE.

Front
L
48%
R
48%
C
82%
LFE
LFE
15%
Surround
Ls
29%
Rs
28%
Lrs
17%
Rrs
17%
Wide
Lw
0.1%
Rw
0.2%
Height
Ltf
0%
Rtf
0%
Ltm
7.6%
Rtm
8.2%
Ltr
unused
Rtr
unused
0:001:012:02

Read from PerceptualPro's channel-activity graph, pixel by pixel. A lane marked unused never rises out of its line.

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