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Playful Style — high

Evolving prompt+sampling to push VoiceNet dimension S_PLAY in the high direction with the vn_S_PLAY__high LoRA. Steering phrase: playful, mischievous, sing-song delivery.

Best in-direction score 0.736 at 100% vs neutral 0.272 (shift +0.464).
Method & reproducibility — how the evolution ran
Base model: laion/moss-tts-local-transformer-4.55b-voice-acting-v2 · LoRA: the new VoiceNet-dimension LoRA vn_<CODE>__<high|low> (retrained with ≤25% game-character data, rank 32), applied via PEFT adapter scaling at strength λ.
Algorithm: genetic search — population 12, 10 generations, elitism (top 5). During evolution every genome is generated best-of-6 with the LoRA at λ=100%; its fitness = the mean over those 6 candidates of the target VoiceNet dimension score in the intended direction (for a __high LoRA the raw score; for __low, 1−score), minus 0.2·max(0, WER−0.6).
Genome (what evolves): the GENERAL voice description, the SCRIPT cue, the carrier sentence, and the sampling params (temperature, top_p, top_k). λ is fixed at 100% during the search.
Mutation operators: 40% regenerate description, 25% swap carrier, 17% jitter temperature ±0.1, 18% change top_k. Offspring = 60% crossover + mutation, 40% mutation.
Dose measurement (below): the winning recipe is then re-generated at λ=0 (LoRA OFF), λ=50% and λ=100% (each best-of-6) to show exactly what 50% vs 100% of the LoRA brings over the no-LoRA baseline.

Dose — what 50% vs 100% brings (top recipe)

λ=0 (no LoRA) — dir 0.284 (raw 0.28)
WER 0.00 · genu 0.11
λ=50% — dir 0.452 (raw 0.45)
WER 0.00 · genu 0.16
λ=100% — dir 0.736 (raw 0.74)
WER 0.47 · genu 0.19
GENERAL: A voice that is distinctly playful, mischievous, sing-song delivery. SCRIPT: (extremely playful, mischievous, sing-song delivery) "Please remember to lock the door before you head out." · temp 0.9 top_p 0.9 top_k 40

Other evolved recipes (100%)

— dir 0.732 (raw 0.73)
WER 0.53 · genu 0.20
A voice that is distinctly playful, mischievous, sing-song delivery.
— dir 0.724 (raw 0.72)
WER 0.45 · genu 0.12
A voice that is markedly playful, mischievous, sing-song delivery.
— dir 0.718 (raw 0.72)
WER 0.35 · genu 0.13
A voice that is distinctly playful, mischievous, sing-song delivery.
— dir 0.715 (raw 0.71)
WER 0.36 · genu 0.16
A voice that is markedly playful, mischievous, sing-song delivery.
— dir 0.714 (raw 0.71)
WER 0.53 · genu 0.19
A voice that is strongly playful, mischievous, sing-song delivery.