Clean full rewrite: A) RMS/flatness onset curves + Whisper first/last 10s; B) latent-scale check; C) teacher-forced stock-vs-SOAR on held-out shard-3 dialogues
Three-part closed-loop diagnosis: A) RMS/flatness-onset analysis of SOAR wavs vs stock control + Whisper first/last 10s; B) latent-scale check (x0hat std vs target); C) teacher-forced stock-vs-SOAR head on held-out shard-3 dialogues