Window 1's Recorded Sound: First Analysis Finds a Short Repeating Pattern, Meaning Unknown

As previously reported on October 11th, during a 72-minute opening of Window 1, 'the Lit City,' beginning at 2:40 a.m. that day, a low sound whose intensity rose and fell in near-sync with the procession of lights was captured on the window room's recording equipment for the first time. At the time, the Dimensional Survey Division said analysis, including whether the recording even qualified as a "sound," was still ahead. In its announcement on the 22nd, the division revealed it had advanced to judging the recording as "a signal with repetition — at minimum, not noise."

Technician Toru Yuzuki, 31, a second-generation Drifter of the rabbit lineage who led the analysis, said that plotting the 72-minute recording's intensity as a waveform revealed a short repeating cycle of roughly 2.4 seconds, holding nearly constant throughout the opening. "At first I suspected atmospheric pressure changes, or the sound of our own equipment operating. But cross-checking against the equipment's own logs turned up no matching activity. All we can say is that the source lies on the other side of the window."

Analysis also examined how the sound related to the previously reported procession of lights (roughly 140 this time, over 300 the time before). Yuzuki said, "The pace of the procession's movement and the sound's repeating cycle didn't line up exactly. They're close, but they don't overlap. Without a longer recording, we can't tell whether it's coincidence or a connection running slightly out of phase." As previously reported, the standing view on Window 1 — that there is no evidence the other side recognizes us — remains unchanged; this analysis neither supports nor overturns it.

One window keeper who spends nights in the observation room told this paper, "That night, I was too busy counting the procession to pay much attention to the sound. Listening back to the recording afterward and finding there really was a repeating pattern left me feeling a little frightened, and a little glad, at the same time." Another keeper said, "Even sitting there every night, it's rare for anything with a pattern to come back from the other side at all. Just having a pattern makes it feel, somehow, like being spoken to — even though we don't know what it means."

As previously reported, the external expert review panel (chaired by Etsuko Kajiura) meeting in November already carries eight agenda items, but the division said it would not formally add this analysis to that agenda. Division Director Makoto Hiura explained, "We'll share it as material, but the analysis isn't precise enough yet to put on the agenda. We'd rather not have meaning get ahead of an analysis that's still half-finished."

The owner of Window Light Teahouse, which sells window-themed goods, said, "More customers have been asking whether it's a rhythm or a song. All we can do is say we don't know, but a lot of our customers enjoy not knowing." Meanwhile, a consumer group that campaigns against sensory-development scams again warned, "We're concerned this could invite materials or seminars claiming to 'know what the sound really is.' The division's announcement itself was careful, but people should be wary of anyone trying to ride on it."

Yuzuki said, "If there's a longer opening next time, I'd like to extend the recording and push the analysis one step further. But when the next opening comes isn't something we control. Waiting is, as always, all there is to do." The division said it will keep recording every time Window 1 opens and will publish further findings as they come. The Lit City's low sound, its meaning undisclosed, may be sounding at the very same interval again tonight.