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Teacher/Didactic Style — high

Evolving prompt+sampling to push VoiceNet dimension S_TECH in the high direction with the vn_S_TECH__high LoRA. Steering phrase: a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable.

Best in-direction score 0.569 at 100% vs neutral 0.277 (shift +0.292).
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 0.316 (raw 0.32)
WER 0.74 · genu 0.07
λ=50% — dir 0.338 (raw 0.34)
WER 0.27 · genu 0.18
λ=100% — dir 0.569 (raw 0.57)
WER 0.11 · genu 0.23
GENERAL: A voice that is markedly a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable. SCRIPT: (clearly a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable) "The meeting is scheduled for three o'clock on Tuesday afternoon." · temp 1.1 top_p 0.9 top_k 40

Other evolved recipes (100%)

— dir 0.564 (raw 0.56)
WER 0.56 · genu 0.29
A voice that is markedly a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable.
— dir 0.524 (raw 0.52)
WER 0.09 · genu 0.17
A voice that is intensely a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable.
— dir 0.515 (raw 0.52)
WER 0.45 · genu 0.17
A voice that is extremely a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable.
— dir 0.508 (raw 0.51)
WER 0.23 · genu 0.30
A voice that is markedly a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable.
— dir 0.506 (raw 0.51)
WER 0.12 · genu 0.27
A voice that is intensely a voice with strongly pronounced teacher/didactic style, teacher/didactic style-forward and unmistakable.