Instruments sound like themselves: register law, level fixes, the B-3 returns

Four Paul complaints, one charter, all measured:

REGISTER LAW — a catalog scan found 545 sampled lanes playing +12..+34 st above their top zone (a tuba solo at +33.8).

• Steel guitar (standbylightdrive): the anchor's lead level [.3,.42] was tuned for hot synth plucks; sampled-default remapped it to guitar multisamples AND (wet = send/lvl) inflated its own wash.

• Blues organ ("reedy and distant"): the anchor's deliberate B-3 (drawbars, leslie .85-.95, 3rd-harm perc) was being remapped to GM strings/reed organ — drawbar and rotary params no zone honors.

• Gabber's oboe: masked by design (healthy level under kick 1.7 + pump .68 at 175 bpm), not under-leveled — deferred to the MUSICALITY AUDIBLE audit with the honest options on record.

Verified: Matrix 228/228 --no-cache; fixture drift exactly the intended 10 state hashes (the two anchor fixes), mapping guards zero-drift

▶ Play it: Jackhammer Communion → Loon Referendum → Crossroads Paperwork — the three genres this change names, as one path https://stellate.app/?genre=gabber&seed=2125&path=1809.17533,1505.3720,1036.22151&xdur=0.041

ec1c75b https://github.com/aboard-io/stellate/commit/ec1c75bd606dc05ce61693eb02f9f77355d8204e