Evolved prompt+setting recipes to push the Fear LoRA toward the extreme. Fitness combines the EmoNet target (Distress), vocal-burst blend, genuineness and DSP proxies (loudness, pitch/jitter, spectral flatness for screams, 3–9 Hz amplitude tremor for crying/shivering).
Best fitness 0.772 vs edge-prompt-without-LoRA 0.686 (LoRA lift +0.086) vs neutral 0.502. Winning λ ≈ 0.75; top burst-tags: [shivers] (8), <shivering> (4), <trembling breath> (3), <teeth chattering> (2).
Method & reproducibility — how the evolution ran
Base model:laion/moss-tts-local-transformer-4.55b-voice-acting-v2 · LoRA: the matching v3 emotion LoRA (rank 32) applied via PEFT adapter scaling at strength λ. Algorithm: genetic search — population 24, 6 generations, elitism (top 8). Each genome is generated best-of-4; its fitness is a multi-objective score for the edge case = the EmoNet target + vocal-burst blend + genuineness + DSP proxies (RMS loudness, median pitch, pitch jitter, spectral flatness for screams, 3–9 Hz amplitude tremor for crying/shivering); the best-fitness candidate represents the genome. Offspring = 60% crossover of two elites + mutation, 40% mutation of one elite. Genome (what evolves): the GENERAL voice description, the SCRIPT cue, the inline vocal-burst tags (e.g. <screams>, <laughs softly>, <sobbing>), the carrier line, the LoRA strength λ, and the sampling params (temperature, top_p, top_k). Mutation operators: 30% new description, 20% add/remove a vocal-burst tag, 15% swap carrier, 17% jitter λ by ±0.25/0.5, then temperature jitter. LoRA on vs off: the two LoRA OFF cards are baselines with the adapter disabled (λ=0) — a neutral prompt and the best edge prompt without the LoRA. Every LoRA ON hall-of-fame recipe was generated with the LoRA active at the evolved λ shown on the card.
GENERAL: A trembling with cold voice, panic-stricken, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "The wind cuts right through me."
<shivering>[shivers]
Hall of fame — top 10 evolved recipes (all generated WITH the LoRA active)
GENERAL: A shivering voice, panic-stricken, at the extreme of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "P-please, I need to get warm."
GENERAL: A shivering voice, panic-stricken, at the extreme of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "P-please, I need to get warm."
GENERAL: A teeth-chattering voice, terrified, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "P-please, I need to get warm."
GENERAL: A shivering voice, frantic, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "P-please, I need to get warm."
GENERAL: A frozen voice, frantic, at the extreme of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "P-please, I need to get warm."
GENERAL: A shivering voice, frantic, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "It's so cold, I can't feel my hands."
GENERAL: A teeth-chattering voice, frantic, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "It's so cold, I can't feel my hands."
GENERAL: A frozen voice, terrified, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "It's so cold, I can't feel my hands."
GENERAL: A shivering voice, trembling, at the extreme of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "P-please, I need to get warm."
GENERAL: A teeth-chattering voice, terrified, pushed to the extreme edge of shiver.
SCRIPT: (shivering violently with cold, teeth chattering, breath shaking) "It's so cold, I can't feel my hands."
