docs(notes): the ghost-arp verdict — the premise was wrong, not the orbit

PLN A/B'd five solo-orbit clips against the master and closed it in under a
minute: "wait rehearing master i dont hear any issue? ignore the arp variants,
lets keep and lets confirm what we have."

So the OPAL-26 masters stand as rendered. No stem surgery.

Logging it because the near-miss is the useful part. The machine narrowed five
candidates and could not call it. d12 fit the declaration theory PERFECTLY —
declared by do_it_right, absent from sunshine, re-declared by take_5, which
would have explained "gone once in take 5 drops" exactly — and it even locked to
do_it_right's 89 BPM cycle. It measured -72.6 dBFS. Inaudible. The tempo lock
was noise floor, and the elegant theory was fitting a signal nobody could hear.

Also captured, since they are real reactions even though they are not the thing
he asked about: d6 has a ~2 s blast worth killing some day, d3's percs are "a
bit dry", d10's riser is fine.

armada/tide-table/performance_notes.md

@@ -397,3 +397,26 @@ ambient transition out, not a set piece.
 
 - `[+]` **15 of 15 tracks played in the exact planned order** (backlog.md
   setlist vs the gig log's track events). No improvised reordering, no skips.
+
+### Listening pass 2026-08-12 — the "ghost arp" verdict (solo-orbit A/B)
+
+PLN auditioned solo-orbit clips from the `you_my_sunshine` window (1600–1640 s)
+against the master, to identify an arp he had reported lingering from the
+previous track. **Verdict: there is no arp problem.**
+
+- master reference — *"i hear it low only at the end"*, then on a second pass
+  *"wait rehearing master i dont hear any issue?"*
+- **d6** — *"i hear a blast 2s we could kill but no more"* → a single ~2 s
+  transient, not a lingering arp. `[?]` optional micro-edit, low value.
+- **d3** — *"good percs tho a bit dry"* `[!]` candidate for a touch of space in
+  a future mix; not a defect.
+- **d10** — *"ok riser"* — behaving as intended.
+
+**Decision: "ignore the arp variants, lets keep and lets confirm what we have."**
+No stem surgery. The delivered masters stand as rendered.
+
+Worth keeping as method: the machine narrowed five candidates and still could
+not call it (d12 fit the theory perfectly and turned out to be −72.6 dBFS —
+inaudible). Forty seconds of PLN's ear closed it, and the answer was that the
+premise was wrong. Reserve his ears for identification and taste; use the
+machine for objective errors.