Review 6.8 dB dialogue gap One technique, 61 repetitions Subtitles fail on captions
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Review

Signal Hours Builds Its Whole Horror On A Compression Trick, And It Works Once

Every time the radio speaks, the game ducks all other sound to near silence. The first occurrence is one of the most effective things we have heard in a horror game. We counted sixty-one occurrences across eight hours, applied identically, and by roughly the twentieth the effect had become a stage direction rather than a fright.

7.4 audio 6.8 dB gap Headphones required 16 min read
A dim broadcast booth at night with a microphone on a boom arm, a glowing pale blue signal meter on the wall and an empty chair
One extremely good idea, deployed sixty-one times without variation.

The technique is simple and effective. When the radio transmits, a heavy sidechain compressor pulls every other element down by roughly twenty-four decibels over about eighty milliseconds. Ambience, footsteps, wind, the lot. The world stops and the voice is the only thing left.

Used once, this is remarkable. It creates a physical sense of attention narrowing, and it is far more frightening than the content of the transmission itself. We stopped playing for a moment after the first one, which is the highest compliment we can pay a horror mix.

Sixty-one occurrences, measured

We logged every transmission and measured the duck depth and recovery time for each. The consistency is remarkable and it is precisely the problem.

Occurrence rangeCountDuck depthRecoveryOur response
1st1−24 dB340 msGenuine fright
2nd to 8th7−24 dB340 msTension, effective
9th to 20th12−24 dB340 msAnticipation, diminishing
21st to 45th25−24 dB340 msRecognised as a cue
46th to 61st16−24 dB340 msActively tiresome

Not one variation across eight hours. No shallower duck for a routine transmission, no deeper one for a critical moment, no change in recovery time to signal urgency. The game found its best idea before it started and then declined to develop it, and a horror mix that becomes predictable has stopped doing its job.

Dialogue-to-effects gap

6.8 dB

Slightly above the median of six across thirty-eight games. Ordinary conversation sits well below the loud incidents, and because the ducking mechanism only applies to radio transmissions, normal dialogue receives no help at all.

The subtitle failure

This is the more serious problem and it is not a matter of taste. The game's central mechanism is a sound effect, and the subtitles do not caption sound effects at all. A player relying on subtitles receives the words of every transmission and no indication whatsoever that the world went silent around them.

That player is not experiencing a weaker version of the game. They are experiencing a different one, in which a horror technique that defines the entire work is invisible. Three of our four subtitle criteria pass here; the fourth fails completely, and it is the one that matters most given what this particular game is built on.

CriterionResultNote
Size adjustablePassFour options, sensible default
ContrastPassHolds against the brightest scene
Speaker labelsPassConsistent throughout
Effects captionedFailNo effect captions of any kind

If your horror lives in a sound effect, a player reading subtitles is playing a game with the horror removed.

Headphones, and no acknowledgement of it

The ducking effect depends on hearing the ambient bed clearly enough to notice its absence. On near-field speakers in a normal room the bed is already competing with the room, so the duck is much less dramatic. We measured a perceptual difference large enough that we would call the speaker experience a different game again.

Nothing in the options or the opening screens mentions this. A recommendation to use headphones costs a single line of text and would materially improve the experience of anyone who reads it.

What is genuinely good

Beyond the central trick, the ambient bed itself is excellent: a specific, textured, slightly wrong room tone that we found unsettling before anything had happened. The voice performances are recorded with a deliberate proximity that suits the medium, and the transmission processing is convincing without tipping into pastiche.

Had the ducking been varied even slightly across those sixty-one occurrences, this would have been one of the highest scores in our table. The raw material is there.

Audio verdict

7.4/10

An outstanding technique applied sixty-one times without a single variation, atop an excellent ambient bed. Held down by a 6.8 dB dialogue gap, a total absence of effect captions in a game whose horror is a sound effect, and a dependence on headphones the game never mentions.