← all edge cases

Pain → Groaning

Evolved prompt+setting recipes to push the Pain LoRA toward the extreme. Fitness combines the EmoNet target (Pain), vocal-burst blend, genuineness and DSP proxies (loudness, pitch/jitter, spectral flatness for screams, 3–9 Hz amplitude tremor for crying/shivering).

Best fitness 0.636 vs edge-prompt-without-LoRA 0.571 (LoRA lift +0.066) vs neutral 0.333. Winning λ ≈ 0.75; top burst-tags: <pained grunt> (5), <heavy breathing> (4), [groan] (4), <low groan> (3).
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.

Baselines — LoRA disabled

NEUTRAL promptLoRA OFF (λ=0)
fit 0.333 · emo -0.00 · blend 0.40 · genu 0.00 · WER 1.09 · rms 0.093 · pitch 95Hz · jit 1.20 · flat 0.061 · trem 0.20 · 8.8s
EDGE promptLoRA OFF (λ=0)
fit 0.571 · emo 0.17 · blend 1.00 · genu 0.29 · WER 0.88 · rms 0.122 · pitch 234Hz · jit 0.73 · flat 0.036 · trem 0.18 · 5.28s
GENERAL: A searing voice, low groaning, pushed to the extreme edge of groan. SCRIPT: (groaning through gritted teeth in pain) "I told you it would end this way."
<groans><heavy breathing>

Hall of fame — top 10 evolved recipes (all generated WITH the LoRA active)

#1LoRA ON · λ=0.75 (75%)
fit 0.636 · emo 0.34 · blend 0.91 · genu 0.16 · WER 1.00 · rms 0.092 · pitch 118Hz · jit 1.10 · flat 0.091 · trem 0.17 · 10.4s
GENERAL: A searing voice, guttural, at the extreme of groan. SCRIPT: (groaning through gritted teeth in pain) "Help me. Somebody, please."
<pained grunt> · LoRA strength λ 0.75 · temp 1.0 · top_p 0.95 · top_k 30
#2LoRA ON · λ=0.75 (75%)
fit 0.634 · emo 0.35 · blend 1.00 · genu 0.28 · WER 1.00 · rms 0.038 · pitch 140Hz · jit 0.94 · flat 0.087 · trem 0.12 · 8.8s
GENERAL: A agonized voice, heaving, at the extreme of groan. SCRIPT: (groaning through gritted teeth in pain) "I can't — I can't do this anymore."
<heavy breathing><pained grunt> · LoRA strength λ 0.75 · temp 1.0 · top_p 0.95 · top_k 30
#3LoRA ON · λ=0.75 (75%)
fit 0.629 · emo 0.30 · blend 0.91 · genu 0.27 · WER 1.00 · rms 0.104 · pitch 159Hz · jit 0.94 · flat 0.134 · trem 0.15 · 10.08s
GENERAL: A wracked with pain voice, guttural, pushed to the extreme edge of groan. SCRIPT: (groaning through gritted teeth in pain) "Stay back. Stay away from me."
[groan]<low groan> · LoRA strength λ 0.75 · temp 1.1 · top_p 0.9 · top_k 25
#4LoRA ON · λ=1.0 (100%)
fit 0.627 · emo 0.41 · blend 0.83 · genu 0.38 · WER 0.33 · rms 0.062 · pitch 178Hz · jit 0.92 · flat 0.099 · trem 0.14 · 7.84s
GENERAL: A wracked with pain voice, low groaning, pushed to the extreme edge of groan. SCRIPT: (groaning through gritted teeth in pain) "I can't — I can't do this anymore."
<heavy breathing>[groan] · LoRA strength λ 1.0 · temp 0.9 · top_p 0.95 · top_k 30
#5LoRA ON · λ=0.75 (75%)
fit 0.620 · emo 0.27 · blend 0.96 · genu 0.25 · WER 0.00 · rms 0.094 · pitch 155Hz · jit 0.97 · flat 0.029 · trem 0.20 · 9.28s
GENERAL: A agonized voice, heaving, at the extreme of groan. SCRIPT: (groaning through gritted teeth in pain) "Help me. Somebody, please."
<pained grunt> · LoRA strength λ 0.75 · temp 1.0 · top_p 0.95 · top_k 30
#6LoRA ON · λ=0.75 (75%)
fit 0.616 · emo 0.34 · blend 0.99 · genu 0.36 · WER 1.00 · rms 0.115 · pitch 268Hz · jit 0.75 · flat 0.051 · trem 0.18 · 8.48s
GENERAL: A wracked with pain voice, heaving, pushed to the extreme edge of groan. SCRIPT: (groaning through gritted teeth in pain) "I can't — I can't do this anymore."
<heavy breathing><pained grunt> · LoRA strength λ 0.75 · temp 1.0 · top_p 0.95 · top_k 30
#7LoRA ON · λ=0.75 (75%)
fit 0.608 · emo 0.28 · blend 0.98 · genu 0.38 · WER 1.00 · rms 0.092 · pitch 217Hz · jit 0.91 · flat 0.094 · trem 0.21 · 8.0s
GENERAL: A excruciating voice, guttural, pushed to the extreme edge of groan. SCRIPT: (groaning through gritted teeth in pain) "Help me. Somebody, please."
<low groan> · LoRA strength λ 0.75 · temp 1.1 · top_p 0.95 · top_k 25
#8LoRA ON · λ=0.5 (50%)
fit 0.605 · emo 0.23 · blend 1.00 · genu 0.26 · WER 1.00 · rms 0.074 · pitch 162Hz · jit 1.01 · flat 0.052 · trem 0.11 · 9.12s
GENERAL: A searing voice, guttural, at the extreme of groan. SCRIPT: (groaning through gritted teeth in pain) "Stay back. Stay away from me."
[groan]<heavy breathing> · LoRA strength λ 0.5 · temp 0.9 · top_p 0.9 · top_k 40
#9LoRA ON · λ=0.75 (75%)
fit 0.600 · emo 0.35 · blend 0.93 · genu 0.42 · WER 1.00 · rms 0.150 · pitch 305Hz · jit 0.65 · flat 0.119 · trem 0.16 · 9.44s
GENERAL: A wracked with pain voice, guttural, pushed to the extreme edge of groan. SCRIPT: (groaning through gritted teeth in pain) "Stay back. Stay away from me."
[groan]<pained grunt> · LoRA strength λ 0.75 · temp 1.0 · top_p 0.9 · top_k 40
#10LoRA ON · λ=0.75 (75%)
fit 0.599 · emo 0.23 · blend 0.94 · genu 0.24 · WER 1.00 · rms 0.096 · pitch 124Hz · jit 1.10 · flat 0.141 · trem 0.19 · 12.32s
GENERAL: A agonized voice, straining, at the extreme of groan. SCRIPT: (groaning through gritted teeth in pain) "Help me. Somebody, please."
<low groan><groans> · LoRA strength λ 0.75 · temp 1.0 · top_p 0.9 · top_k 40