gig: 9 of 9 off-map orbits were ghosts, and no Master to fall back on

Corrections and additions to the Thu-24 reconstruction, all from sources
that should have been read first.

The fader claim was wrong on cause: I blamed the LCXL lap reset, but every
one of those journal lines says 'effect knobs -> 0' and '(no CC sent)' —
Tidal params, not Ardour gain. The 2026-08-14 forensics had already settled
it as a faithful save of faders in motion. Same verdict now reached from
the audio side, which is the new part.

Verified rather than assumed: dN == Ardour 'Tidal NN', from BootTidal.hs,
fold-orbits.py and check-mix.py independently. That is what makes the
missing stem d8.

New: all nine off-map orbits were declared by the immediately preceding
track, so #68's ghost mechanism is now measured in audio, with levels —
take_5_drops ran its whole 8m43s under piment_bresilien's orbit 04 at 99%
active. And the answer to 'why no Master to recover from': Master is a bus
Ardour cannot arm, while the out-of-Ardour net gig_record.sh has no unit
and no inventory entry, so nothing ever asserts it.

Dropped: a killed-recorder verdict that was an artifact of reporting on a
sliced log, a laptop-speaker inference the data does not support, and a
13-of-15 peak count that should have been 12 of the 13 captured.

armada/tasks/048-the-set-that-logged-itself.md

@@ -39,8 +39,17 @@ percussive material is not an optimisation, it is a wrong answer.
 - **Orbit 08 was never armed** (`rec-enable value="0"`, alone among 12), and the
   control map lists it in all 15 tracks. No file was created — an absent stem,
   not a silent one.
-- **No MIDI from either recorder.** gig-log bound seq port `133:0` at 00:59 and
-  never rebound; Ardour's `Keys` wrote 24 files of 26 bytes each.
+- **No MIDI at all**: gig-log bound seq port `133:0` at 00:59 and never rebound.
+  Zero control moves for the whole set. (Ardour's `Keys` track is not a second
+  chance — nothing routed the board to it.)
+- **No Master either.** `Master` is a bus: no playlist, no `rec-enable`. Ardour
+  cannot arm it. The out-of-Ardour safety net `tools/gig_record.sh` exists, is
+  item 9 of the RUNBOOK, and has never been started on this machine — no
+  `recordings/` dir, no systemd unit, no entry in `rig_units.py`.
+- **#68 measured in audio for the first time.** Nine orbits sounded off-map;
+  **9 of 9** were declared by the immediately preceding track. Two at 99% active:
+  `take_5_drops` ran its whole 8m43s with `piment_bresilien`'s orbit 04 — the
+  loudest orbit of the night — still underneath it.
 
 ## Sel (the shareable learning)
 **The lens that saved the night was not built for it.** gig-log has a MIDI lens,
@@ -54,11 +63,13 @@ first record to the last: Ardour's own transport feedback never once said
 Redundancy is not three copies of the good instrument. It is four instruments
 that fail differently.
 
-Corollary, learned the same morning: **the session file no longer holds the mix
-you played.** Nine of twelve faders read −∞ in `Tidal Live.ardour`, saved at
-19:44:41, twenty-six seconds after a surface `lap reset` zeroed the board. The
-stems prove those faders were up — orbit 04 sits at a −17 dBFS median and is the
-loudest orbit in 13 of 15 tracks. Audit the artifact, not the config.
+Corollary, and it closes an old file: **the session save does not hold the mix you
+played.** Nine of twelve faders read −∞ in `Tidal Live.ardour` (saved 19:44:41)
+while the stems, written post-fader, are loud. `2026-08-14-ardour-inf-forensics.md`
+had already ruled out automation and corruption and called it a faithful photograph
+of wherever the physical faders were at save time. This is the same verdict reached
+from the opposite side — for the first time with the audio to prove the routes were
+live. Audit the artifact, not the config.
 
 ## Hameçon (hook)
 "I forgot to hit record." Ninety-four minutes later the laptop could still name
@@ -67,7 +78,8 @@ the LEDs.
 
 ## Sillage (what it unlocks)
 - Mastering can start: 11 stems, 76m19s, t0 = 18:27:41.201, per-orbit levels done.
-- Peaks over 0 dBFS on 13 of 15 tracks (worst +7.7) — the limiter was working.
-  His ear decides whether that is the sound.
+- Peaks over 0 dBFS on 12 of the 13 captured tracks (worst +7.7) — the limiter was
+  working. His ear decides whether that is the sound.
 - A REC reminder is now buildable **and** the lens it must not use is identified.
-- Two open holes with names: orbit 08's arm, and gig-log's MIDI rebind.
+- Three open holes with names: orbit 08's arm, gig-log's MIDI rebind, and
+  `gig_record.sh` having no unit in the inventory that asserts it.

armada/tide-table/build_gig_reconstruction.py

@@ -18,6 +18,12 @@ uses audio to guess a name.
            track uses. Independent of gig-log; it survived the gig where
            gig-log's MIDI lens did not (it had bound port 133:0 at 00:59 and
            never rebound, so `cc` is empty for the whole set).
+
+ORBIT NUMBERING, verified not assumed: `dN` is `xfade N . (|< orbit N-1)`
+(BootTidal.hs:215-226), fold-orbits.py:166 states "orbit k is played by `dk`",
+and check-mix.py's docstring diagnoses "`d9`-`d12` make no sound" as the
+`Tidal 09`..`Tidal 12` faders being shut — so LCXL column N == dN == Ardour
+stem `Tidal NN`, one-to-one across all three layers.
   stems    full-resolution 1 s RMS/peak per orbit from the Ardour take. Ground
            truth for what actually reached the DAW.
 
@@ -27,8 +33,11 @@ measured INSIDE those windows.
 TWO READINGS THAT ARE NOT ERRORS
   * an orbit MAPPED BUT QUIET — a knob existed, the orbit stayed under the
     floor. Same reading as an unresolved sample name: normal, never an error.
-  * an orbit HEARD OFF-MAP — it played with no knob on the surface. Can also be
-    a previous pattern still running, so it is reported, not interpreted.
+  * an orbit HEARD OFF-MAP — it sounded with no knob painted for it. Usually
+    #68: `dN $ ...` replaces orbit N and says nothing about the others, so
+    every orbit the outgoing track declares and the incoming one does not keeps
+    running underneath (see tools/orphan-orbits.py). The `ghost` field says
+    whether the previous track declared it; that is a mechanism, not a fault.
 
 DECIMATION IS A TRAP HERE. The first pass read 4096 of every 48000 frames and
 the window kept landing between hits, so most orbits looked 0% active. Every
@@ -124,8 +133,8 @@ def stem_levels(stem_dir: Path, take: str) -> tuple[dict[int, dict], float, floa
 
 # ── lenses ───────────────────────────────────────────────────────────────────
 def gig_log(log: Path, day: str, lo: str, hi: str):
-    """(eval events, rec transitions, session stats) inside the window."""
-    evals, recs, samples = [], [], []
+    """(eval events, rec transitions, 1 Hz samples, MIDI events) in the window."""
+    evals, recs, samples, midi = [], [], [], []
     for line in log.open(errors="replace"):
         if not line.strip():
             continue
@@ -146,7 +155,9 @@ def gig_log(log: Path, day: str, lo: str, hi: str):
             recs.append(r)
         elif k == "s":
             samples.append(r)
-    return evals, recs, samples
+        elif k in ("cc", "note"):
+            midi.append(r)
+    return evals, recs, samples, midi
 
 
 def surface_loads(day: str, lo: str, hi: str):
@@ -179,7 +190,7 @@ def db(x: float) -> float:
 def build(args) -> dict:
     day = args.date
     lo, hi = args.window
-    evals, recs, samples = gig_log(Path(args.log), day, lo, hi)
+    evals, recs, samples, midi = gig_log(Path(args.log), day, lo, hi)
     loads = surface_loads(day, lo, hi)
     if not loads:
         raise SystemExit("surface lens empty — is lcxl3-driver's journal still there?")
@@ -241,6 +252,8 @@ def build(args) -> dict:
             row["mapped_but_quiet"] = [o for o in s["orbits_mapped"]
                                        if o in orbits and o not in heard]
             row["heard_off_map"] = [o for o in heard if o not in s["orbits_mapped"]]
+            prev = seq[i - 2]["orbits_mapped"] if i > 1 else []
+            row["ghost_of_previous"] = [o for o in row["heard_off_map"] if o in prev]
             row["peak_db"] = max(v["peak_db"] for v in lv.values())
             row["loudest_orbit"] = max(lv, key=lambda o: lv[o]["rms_p50_db"])
             row["levels"] = lv
@@ -259,7 +272,7 @@ def build(args) -> dict:
         "captured_pct": round(100 * dur / (seq[-1]["end"] - seq[0]["start"])),
         "orbits_missing_from_take": missing,
         "rec_lens_conflicts": len(conflicts),
-        "midi_cc_in_window": 0 if not any(r.get("k") == "cc" for r in samples) else None,
+        "midi_events_in_window": len(midi),
         "planned_not_played": [p for p in planned if p not in played],
         "played_not_planned": [p for p in played if p not in planned],
         "post_set_loads": post,
@@ -303,6 +316,10 @@ def main() -> int:
         print(f"  head lost: {out['head_lost_s']//60}m{out['head_lost_s']%60:02d}s")
     if out["orbits_missing_from_take"]:
         print(f"  orbits with NO stem: {out['orbits_missing_from_take']}")
+    print(f"  MIDI events logged during the set: {out['midi_events_in_window']}")
+    off = sum(len(r.get("heard_off_map") or []) for r in out["tracks"])
+    gh = sum(len(r.get("ghost_of_previous") or []) for r in out["tracks"])
+    print(f"  orbits heard off-map: {off}, of which #68 ghosts of the previous track: {gh}")
     print()
     print(table(out))
     if out["played_not_planned"]:

armada/tide-table/take103_2026-09-24_set.json

@@ -14,7 +14,7 @@
   8
  ],
  "rec_lens_conflicts": 4579,
- "midi_cc_in_window": 0,
+ "midi_events_in_window": 0,
  "planned_not_played": [],
  "played_not_planned": [
   "sunny_side_up"
@@ -147,6 +147,9 @@
    "heard_off_map": [
     12
    ],
+   "ghost_of_previous": [
+    12
+   ],
    "peak_db": -4.1,
    "loudest_orbit": 1,
    "levels": {
@@ -271,6 +274,10 @@
     4,
     9
    ],
+   "ghost_of_previous": [
+    4,
+    9
+   ],
    "peak_db": 7.7,
    "loudest_orbit": 4,
    "levels": {
@@ -399,6 +406,10 @@
     5,
     12
    ],
+   "ghost_of_previous": [
+    5,
+    12
+   ],
    "peak_db": 5.3,
    "loudest_orbit": 4,
    "levels": {
@@ -523,6 +534,9 @@
    "heard_off_map": [
     9
    ],
+   "ghost_of_previous": [
+    9
+   ],
    "peak_db": 1.4,
    "loudest_orbit": 4,
    "levels": {
@@ -650,6 +664,9 @@
    "heard_off_map": [
     4
    ],
+   "ghost_of_previous": [
+    4
+   ],
    "peak_db": 5.1,
    "loudest_orbit": 4,
    "levels": {
@@ -769,6 +786,9 @@
    "heard_off_map": [
     7
    ],
+   "ghost_of_previous": [
+    7
+   ],
    "peak_db": 4.2,
    "loudest_orbit": 4,
    "levels": {
@@ -897,6 +917,7 @@
     12
    ],
    "heard_off_map": [],
+   "ghost_of_previous": [],
    "peak_db": 5.3,
    "loudest_orbit": 4,
    "levels": {
@@ -1021,6 +1042,7 @@
     12
    ],
    "heard_off_map": [],
+   "ghost_of_previous": [],
    "peak_db": 6.7,
    "loudest_orbit": 4,
    "levels": {
@@ -1139,6 +1161,7 @@
     11
    ],
    "heard_off_map": [],
+   "ghost_of_previous": [],
    "peak_db": 7.6,
    "loudest_orbit": 4,
    "levels": {
@@ -1260,6 +1283,7 @@
     12
    ],
    "heard_off_map": [],
+   "ghost_of_previous": [],
    "peak_db": 2.6,
    "loudest_orbit": 4,
    "levels": {
@@ -1388,6 +1412,9 @@
    "heard_off_map": [
     1
    ],
+   "ghost_of_previous": [
+    1
+   ],
    "peak_db": 4.7,
    "loudest_orbit": 4,
    "levels": {
@@ -1503,6 +1530,7 @@
     7
    ],
    "heard_off_map": [],
+   "ghost_of_previous": [],
    "peak_db": 3.5,
    "loudest_orbit": 4,
    "levels": {
@@ -1627,6 +1655,7 @@
     10
    ],
    "heard_off_map": [],
+   "ghost_of_previous": [],
    "peak_db": 5.8,
    "loudest_orbit": 5,
    "levels": {