Chapter 12
Chapter 12 — "Frequency Analysis"
TL;DR: Grace and Rocky bootstrap a shared spoken language by frequency-mapping Eridian musical chords to English words, and Rocky reveals he is the lone survivor of a crew of twenty-three.

Summary: With a laptop, a microphone array, and tireless patience, Grace decodes Rocky's speech: Eridians "talk" in layered musical chords whose frequency, ratio, and duration encode meaning. Within a day they have basic vocabulary; within a few they are exchanging short sentences. Rocky reveals that his ship arrived at Tau Ceti carrying twenty-three crewmembers — and that he is the only one left. Eridian biology, he explains, is exquisitely sensitive to a thing he doesn't have a word for: radiation. He saw his crewmates sicken and die one by one in transit. He also reveals an Eridian custom that touches Grace deeply: Rocky stands silent, motionless, attentive watch over Grace as he sleeps that night, the way Eridian friends do for one another in the dark.
Key scenes:
- Grace at a workbench with a laptop running spectral-analysis software, microphones taped to the hex-wall
- A growing pencil-and-paper translation table between English and Eridian chord-notation
- Rocky describing twenty-three deaths one by one, holding up small carved figurines for each
- Rocky's still silhouette in his half of the tube, watching over Grace's sleeping body through the hex-wall
Characters present: Ryland Grace, Rocky, the Eridian dead crew (referenced)
Locations / settings:
- The docking-tube hex-wall translation station — laptops, mics, scribbled notes
- A still, dim sleep-watch scene at the hex-wall later that night
Visual motifs: waveform spectrograms glowing on a laptop screen, paper translation chart taped to the wall, twenty-three small carved figurines arranged in mournful rows, a sleeping astronaut on one side of the hex-wall and an unmoving alien guardian on the other
Emotional tone: focused, intimate, mournful, bonded
Confidence: high — both the frequency-analysis bootstrap and the watch-over-sleep scene are signature beats.