Atmos Bubble and boom! Index measured, not opinion

The Forever Purge (2021)

DEMO 6.9 · BUBBLE 7.0 · BOOM 6.8 (with BEQ 8.0). Bass measured on the disc, Atmos. Directed by Everardo Gout. Action, Horror, Thriller.

The Forever Purge (2021) poster
Front
60%
L81%
60%
R81%
100%
C90%
LFE
18%
LFE35%
Surround
21%
Ls51%
20%
Rs50%
17%
Lrs42%
17%
Rrs41%
Wide
0%
Lw0%
0%
Rw1%
Height
1%
Ltf1%
1%
Rtf1%
17%
Ltm53%
17%
Rtm52%
0%
Ltr0%
0%
Rtr0%

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

DEMO
6.9 / 10
Bubble
7.0 / 10
Boom, as released
6.8 / 10
Boom with BEQ
8.0 / 10
Measured release
Disc · Atmos · chart by aron7awol
Deep bass peak, 10–30 Hz
-24.4 dBFS · with BEQ -20.6
Depth, 10–20 vs 30–60 Hz
-1.8 dB · with BEQ +4.5
Average level, 10–30 Hz
-51.1 dBFS · with BEQ -47.2
Minutes of deep bass
30 min · with BEQ 38 min at ≥ −30 dBFS
Tomatometer
48% · as of 16 Jan 2026
Metascore
53 / 100 · as of 16 Jan 2026
Chart scale read
-10 to -70.3 dBFS
Height uptime
17.8%
LFE uptime
34.8% (shown, not scored)
Dynamic range
23.2 dB
Channels used
16 of 16
Genres
Action, Horror, Thriller
Tags
dystopian fiction, horror
Audio
Atmos
Released
1 Jul 2021
First listed
27 Sep 2021
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
81%
R
81%
C
90%
LFE
LFE
35%
Surround
Ls
51%
Rs
50%
Lrs
42%
Rrs
41%
Wide
Lw
0.2%
Rw
0.7%
Height
Ltf
0.6%
Rtf
1.0%
Ltm
53%
Rtm
52%
Ltr
0.3%
Rtr
0.4%
0:000:521:43

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

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