docs(board): R2 closed — faders up and saved, but nine of twelve moved

check-mix reports OK, all 12 orbits reach master. Third recurrence of the
saved--inf bug, closed by PLN's hands.

Two things fell out of verifying it. check-mix resolves the saved session with
Ardour CLOSED — it reads the file, not the process, so the fader check can run
in a pre-gig script before anything is launched. And the diff is bigger than the
fix: orbits 02-06 were in a coherent -8 to -10 dB trim set and are now all near
unity, so nine faders moved where four were broken. Master is still -0.2 so
nothing clips, but the balance between orbits shifted ~9 dB on five of them.

Recorded as a QUESTION, not a finding. The LCXL3's faders are absolute-position
controls and touching one snaps the DAW value to the pot — which also means the
board's 'v3 retires pot-pickup' claim covers the endless ENCODERS only; the
eight faders are still absolute and that whole class survives the upgrade. But
PLN may simply have dragged them on purpose, and a cause nobody asked about is
not a cause.

TASKS_DUMP.md

@@ -2055,3 +2055,49 @@ Pruned (merged, verified): `claude/button-column-migration`, `claude/lcxl3-surfa
 `tidal-to-tracks-tooling`, and tidal-ears' `claude/sc-gated-delete`. Surviving with
 reason: `claude/rig-streamline` (active), `claude/rig-autoconnect-regression`
 (1 unmerged commit, see R2), www `feat/paradiso` (1 unmerged).
+
+---
+
+## ✅ R2 CLOSED — the faders are up and SAVED (2026-09-05, PLN)
+
+*"done and ardour saved and closed :)"* — verified by `tools/check-mix.py`:
+**`OK — all 12 Tidal orbits reach the master bus.`** Third recurrence of the
+saved--inf bug, closed.
+
+Two incidental facts worth keeping:
+
+**1. check-mix works with Ardour CLOSED.** It resolved
+`Ardour/Tidal Live/Tidal Live.ardour` with no `ardour` process alive, so the
+fader check does not need the rig up — it reads the saved file, which is exactly
+the state that matters. Useful: the check can run in a pre-gig script before
+anything is launched.
+
+**2. 🟡 NINE of twelve faders moved, not four — PLN's ears needed.**
+
+| orbit | before | after | Δ |
+|---|---|---|---|
+| 02 | −9.4 | +0.6 | **+10.0** |
+| 03 | −8.4 | −0.1 | **+8.3** |
+| 04 | −10.1 | −0.4 | **+9.7** |
+| 05 | −8.1 | +0.6 | **+8.7** |
+| 06 | −8.4 | +0.6 | **+9.0** |
+| 07 · 08 · 10 · 12 | −inf | +0.6 · +1.5 · +0.1 · +6.0 | the intended fix ✅ |
+| 01 · 09 · 11 | +0.0 · +6.0 · +0.0 | unchanged | — |
+
+Orbits 02–06 were sitting in a **coherent −8 to −10 dB trim set** and are now all
+at roughly unity. Master is unchanged at −0.2 dB so nothing clips, but the
+BALANCE between orbits moved by ~9 dB on five of them.
+
+**Hypothesis, NOT established** — the LCXL3's physical faders are absolute-position
+controls, so touching one snaps the DAW value to wherever the pot actually sits.
+That is the pot-pickup class, and note the board's claim that LCXL v3 "retires the
+pot-pickup value jump" is about the **endless ENCODERS (the knobs)** — the eight
+faders are still absolute, so fader pickup survives the v3 upgrade entirely. But
+PLN may equally have dragged them in Ardour on purpose. **Do not record a cause
+without asking him.**
+
+**Open question for PLN:** was the −8/−10 dB trim on 02–06 deliberate gain
+staging, or was it itself drift? If deliberate, it is gone and wants restoring
+(`feedback_gig_gain_staging`: source peaks at −6 dBFS, let FOH amplify). If it was
+drift, this is now the cleanest that session has been. One listen decides it, and
+only he can.