6.9BUBBLE
2.9BOOM
BEQ 6.8
Back to the Future (1985)DEMO 4.5
H2.7
S4.3
C10.0
bed
height
Back to the Future (1985)
DEMO 4.5 · BUBBLE 6.9 · BOOM 2.9 (with BEQ 6.8). Bass measured on the disc, Atmos. Directed by Robert Zemeckis. Comedy, Adventure, Science Fiction, Family.
Front
29%
L44%
28%
R42%
100%
C94%
LFE
5%
LFE19%
Surround
17%
Ls33%
17%
Rs34%
12%
Lrs29%
12%
Rrs29%
Wide
0%
Lw0%
0%
Rw0%
Height
6%
Ltf19%
6%
Rtf19%
1%
Ltm1%
1%
Rtm1%
5%
Ltr18%
5%
Rtr18%
Bar and top figure — level against the film’s most active channel. Bottom figure — share of the runtime the channel carries signal.
- DEMO
- 4.5 / 10
- Bubble
- 6.9 / 10
- Boom, as released
- 2.9 / 10
- Boom with BEQ
- 6.8 / 10
- Measured release
- Disc · Atmos · chart by aron7awol
- Deep bass peak, 10–30 Hz
- -35.5 dBFS · with BEQ -21.3
- Depth, 10–20 vs 30–60 Hz
- -18.8 dB · with BEQ +4.7
- Average level, 10–30 Hz
- -68.9 dBFS · with BEQ -54.8
- Minutes of deep bass
- 6 min · with BEQ 13 min at ≥ −30 dBFS
- Filtered release
- its BEQ restores up to 32.7 dB at 10–20 Hz
- Tomatometer
- 92% · as of 16 Jan 2026
- Metascore
- 88 / 100 · as of 16 Jan 2026
- Chart scale read
- -10 to -70.3 dBFS
- Height uptime
- 12.5%
- LFE uptime
- 18.9% (shown, not scored)
- Dynamic range
- 24.7 dB
- Channels used
- 16 of 16
- Genres
- Comedy, Adventure, Science Fiction, Family
- Tags
- adventure, comedy, science fiction, teen, time-travel
- Audio
- Atmos, DTS-HD MA 5.1
- Released
- 3 Jul 1985
- First listed
- 4 Dec 2018
- 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
44%
R
42%
C
94%
LFE
LFE
19%
Surround
Ls
33%
Rs
34%
Lrs
29%
Rrs
29%
Wide
Lw
0.1%
Rw
0.1%
Height
Ltf
19%
Rtf
19%
Ltm
0.9%
Rtm
1.0%
Ltr
17%
Rtr
18%
0:000:581:56
Read from PerceptualPro's channel-activity graph, pixel by pixel. A lane marked unused never rises out of its line.