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_recovered_set.md

@@ -27,6 +27,13 @@ independent, and the audio is only ever *measured* — never used to name a trac
 Surface and eval agree to the second on all 15 boundaries, so the timeline below
 is not a fusion verdict — it is two witnesses saying the same thing.
 
+**Orbit numbering, verified not assumed.** `dN` is `xfade N . (|< orbit N-1)`
+(`BootTidal.hs:215-226`); `tools/fold-orbits.py:166` states "orbit k is played by
+`dk`"; and `tools/check-mix.py`'s docstring diagnoses the real 2026-07-27 fault
+"`d9`-`d12` make no sound at all" as the `Tidal 09`…`Tidal 12` faders sitting at
+−∞. Three layers, one-to-one: **LCXL column N == `dN` == Ardour stem
+`Tidal NN`**. That is what makes the missing stem below `d8` and not `d9`.
+
 ## Headline
 
 ```
@@ -71,9 +78,32 @@ Per-orbit `active_pct`, median and max RMS, and peak for every window are in
 
 Two readings in that table are **not errors**. *quiet* means a knob existed and
 the orbit stayed under the floor — the same reading as an unresolved sample name.
-*off-map* means an orbit sounded with no knob painted for it, which can equally be
-a previous pattern still running; `piment_bresilien`'s orbit 12 arrives with
-`love_first` still in the room, and is reported, not interpreted.
+
+*off-map* is better than that: it is **#68, measured in audio for the first time.**
+`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
+(`tools/orphan-orbits.py`, confirmed by ear 2026-07-28 and by code, never by
+level). Nine orbits sounded off-map across the set, and **9 of 9 were declared by
+the immediately preceding track**:
+
+| track | ghost orbit | active | inherited from |
+|---|---|---|---|
+| `piment_bresilien` | 12 | 25% | `love_first` |
+| `take_5_drops` | 04 | **99%** | `piment_bresilien` |
+| `take_5_drops` | 09 | 90% | `piment_bresilien` |
+| `bain_electrique` | 05 | 66% | `take_5_drops` |
+| `bain_electrique` | 12 | 59% | `take_5_drops` |
+| `sunny_side_up` | 09 | 33% | `bain_electrique` |
+| `oct_16_haunted_house…` | 04 | **99%** | `sunny_side_up` |
+| `ete_a_mauerpark` | 07 | 30% | `oct_16_haunted_house…` |
+| `force_motrice` | 01 | 56% | `cafe_tiede` |
+
+Zero false positives, zero unexplained off-map orbits. The two 99% rows are the
+loud ones: a ghost that plays through **the entire next track**, not a tail.
+`take_5_drops` inherited `piment_bresilien`'s orbit 04 — the loudest orbit of the
+night — and ran the whole 8m43s with it underneath. `orphan-orbits.py` predicts
+these from the setlist before a gig; this is the first time the stems confirm
+what it predicts, and at what level.
 
 ## What the recording is missing, and why
 
@@ -90,19 +120,40 @@ about; the two numbers he did not have are *when* and *how much*.
 not a silent stem, an absent one.
 
 That costs something in every single track: the surface lens lists orbit 8 in the
-control map of **all 15**. `d8` is `xfade 8 . (|< orbit 7)` (`BootTidal.hs:222`),
-Ardour's `Tidal 08` is that orbit's stem, and the gig-log `eval` stream lists
-`d8` in every evaluated block of the night. Whatever it was carrying per track is
-not recoverable from this take — and cannot be measured, because the Master bus
-was not recorded either, so there is no reference to subtract the 11 stems from.
-
-**3. No MIDI, from either recorder.** gig-log's `cc` stream has 145 records, all
-between 00:59 and 01:01 the night *before*: it bound sequencer port `133:0` at
-startup and never rebound after the board was replugged. That is the known bug
-already written down in `TODO_GIG.md` ("gig-log loses its MIDI address and never
-looks for it again"). Ardour's `Keys` track wrote `Take104_Keys-1.mid` and
-23 others at 26 bytes each — empty files. So **not one fader move or knob turn
-from the performance was captured as MIDI.**
+control map of **all 15**, and the gig-log `eval` stream lists `d8` in every
+evaluated block of the night. Whatever it was carrying per track is not
+recoverable from this take.
+
+**And there is no Master to recover it from.** `Master` in that session is a
+*bus*: no `audio-playlist`, no `rec-enable` Controllable at all, where every
+`Tidal NN` route has both. Ardour cannot arm a bus — recording the mix needs
+either an extra audio track fed from Master, or a capture outside Ardour.
+
+The capture outside Ardour **already exists and was not running**:
+`tools/gig_record.sh`, "lean, always-on stereo master capture (compressed,
+black-box style) … so a take never goes uncaptured" — opus, hourly segments off
+the default sink monitor, written since OPAL and item 9 of `RUNBOOK.md`'s
+checklist. There is no `recordings/` directory on this machine, so it has never
+been started here. It has **no systemd unit and no entry in `tools/rig_units.py`**,
+which is exactly the shape of the bug that cost CosmicFest its session log:
+a tool that exists, that nothing in the authored inventory knows about, so nothing
+asserts it and `gig-up` cannot gate on it.
+
+Had it been running, the missing 17m44s AND orbit 08 would both be recoverable
+as a stereo mix — imperfect for mastering, decisive for "what did we play".
+
+**3. No MIDI at all.** gig-log's `cc` stream has 145 records, all between 00:59
+and 01:01 the night *before*: it bound sequencer port `133:0` at startup and never
+rebound after the board was replugged. That is the known bug already written down
+in `TODO_GIG.md` ("gig-log loses its MIDI address and never looks for it again").
+**Not one fader move or knob turn from the performance exists as MIDI** — the
+count for the whole set is zero.
+
+Ardour's `Keys` track is not a second chance at this: it wrote
+`Take104_Keys-1.mid` and 23 others at 26 bytes each, but nothing routed the LCXL
+to it. Those are what an armed MIDI track with no keyboard plugged in produces,
+not a failed capture. One recorder was meant to catch the surface, and it was the
+one that was broken.
 
 What survived instead is the `lcxl3-driver` journal: 89 lines across the gig,
 every track load with its orbit list, its control count, its lap reset. That is
@@ -127,21 +178,22 @@ ArdourGUI        30.8% median (max 141), RSS 585 → 679 MB
 pulsar           108% median (max 265), RSS 1332 → 1482 MB, peak 1685
 ```
 
-**Five xruns in ninety-four minutes** is the number of the night. The session's
-full 1182 belong to soundcheck and to the two `sof_sdw` laptop-sink nodes
-(466 + 464) — the laptop speakers `TODO_GIG` step 4 said to cut and whose
-checkbox stayed unticked. Ardour itself: 60 for the whole session, and the audio
-path took 5 during the actual set. The `parvagues-protect` thread demotion from
+**Five xruns in ninety-four minutes** is the number of the night, and they are
+1 SuperCollider, 3 on the UMC's input, 1 on the laptop sink. The session's full
+1182 are almost all soundcheck, and 930 of them sit on the two `sof_sdw`
+laptop-sink nodes (466 + 464) — a path that is not the PA. Ardour itself took 60
+across the whole session. The `parvagues-protect` thread demotion from
 the 22nd holds up under load: four earlier sessions logged 5172 / 4852 / 1114 /
 987 Ardour xruns.
 
 Two things the log says happened and memory would not:
 
-* **ArdourGUI was absent for 349 s of the window** — up at 17:12:45, gone at
-  17:21:00, back at 17:21:06. Both during soundcheck, both before the set.
-* **pulsar disappeared at 19:44:22**, sixteen seconds after REC stopped. Not
-  during the music.
-* **gig-log itself was killed**, not stopped: no `end` record.
+* **Ardour was not up when the stage was handed over.** It first appears at
+  17:12:45 — six minutes into the 17:00 sound-test hour — and restarted once at
+  17:21:00→17:21:06. Both before the set; nothing crashed during the music.
+* **pulsar disappeared at 19:44:22**, sixteen seconds after REC stopped.
+* **The music stopped at 19:43:38**, dead silence from 19:43:39, REC off at
+  19:44:06. The set ended **16m22s before the 20:00 handover** to DJ Gredine.
 
 ## Two instrument bugs this take exposes
 
@@ -152,15 +204,22 @@ agreed at the stop. Ardour's own transport feedback never once said "recording"
 while it was recording. Anything built on that signal — a REC reminder above all
 — would have fired continuously through a perfectly good take.
 
-**The saved session no longer holds the gig's mix.** `Tidal Live.ardour` was
-written at 19:44:41 and has `Tidal 02, 03, 04, 05, 06, 07, 08, 10, 12` at
-`gaincontrol` = 0 → −∞ dB. The stems prove those faders were up while playing:
-orbit 04 alone sits at a −17 dBFS median and is the loudest orbit in 13 of the
-15 tracks. Between the last note and the save, the LCXL logged two `lap reset`
-lines (19:44:15, 19:44:16) and `surface-state.json` went to all-zero. So the
-faders on disk are the post-gig surface state, not the performance — do not read
-that file as a mix reference. (`TODO_GIG` step 6, "Master fader up with the
-mouse. Then Ctrl+S", was never checked off either.)
+**The saved session does not hold the gig's mix, and that is expected.**
+`Tidal Live.ardour` was written at 19:44:41 with nine of twelve Tidal routes at
+`gaincontrol` = 0 → −∞ dB. The stems prove audio was flowing through those routes
+while playing — the take is written `DiskIOPostFader`, and orbit 04 sits at a
+−17 dBFS median, the loudest orbit in 13 of the 15 tracks.
+
+This is not a new bug. `armada/tasks/2026-08-14-ardour-inf-forensics.md` settled
+it: automation `state="Off"` and `n_events=0` on all twelve, no VCA, no route
+group, and the *set* of −∞ tracks changing twice in one evening by non-round
+amounts in both directions. It is a faithful photograph of wherever the physical
+LCXL faders were at `Session::save_state()`. What is new here is the confirmation
+from the other side: the stems say loud, the save says −∞, same routes, same
+night.
+
+**So the session file is not a mix reference.** Use it for routing, arm state and
+processor chains — structure, not gain. For what the mix *was*, measure the stems.
 
 ## For the mastering pass
 
@@ -168,7 +227,8 @@ mouse. Then Ctrl+S", was never checked off either.)
   plain RIFF/WAVE float32 — Ardour wrote no `bext` chunk, so there is no BWF
   origination timestamp and the wall clock comes from `mtime − duration`,
   corroborated within 6 s by the files lens at 18:27:47.
-* **Peaks are over 0 dBFS on 13 of 15 tracks**, worst `take_5_drops` at +7.7 and
+* **Peaks are over 0 dBFS on 12 of the 13 captured tracks** (`piment_bresilien`,
+  the partial one, is the exception at −4.1), worst `take_5_drops` at +7.7 and
   `cafe_bouillant` at +7.6. Float, so nothing clipped on disk; but the Master
   bus ran at −5.0 dB into an ACE Compressor and an LSP Limiter, and those numbers
   say the limiter was doing real work. Whether that is the sound wanted is PLN's

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": {