40-emotion evolution

Evolving maximum emotional expression — all 40 LoRAs

For every one of the 40 emotion LoRAs, a 10-generation evolutionary search over prompt, LoRA strength and sampling maximizes the target EmoNet emotion (fitness = mean over 8 candidates, with a light intelligibility guard). The per-emotion hall-of-fame recipes are generated WITH the emotion LoRA active (at the evolved λ); they are compared against two LoRA-disabled baselines — the best steering prompt without the LoRA, and a neutral prompt. Each emotion page has a Method & reproducibility box with the full algorithm.

Method & reproducibility — how the evolution ran

Base model: laion/moss-tts-local-transformer-4.55b-voice-acting-v2 · LoRA: the matching v3 emotion LoRA (TTS-AGI/moss-emotion-loras-v3, rank 32), applied via PEFT adapter scaling at strength λ.
Algorithm: genetic search — population 16, 10 generations, elitism (top 6 carried over). Each generation: every genome is generated best-of-8 and its fitness = the mean target-emotion strength over those 8 candidates (EmoNet score for the emotion, minus 0.25·max(0, WER−0.6) as a light intelligibility guard). Offspring = 60% crossover of two elites + mutation, 40% mutation of one elite.
Genome (what evolves): the GENERAL voice description, the SCRIPT delivery cue, the carrier sentence, the LoRA strength λ (seeded 0.75–1.5, mutated within 0.4–2.0), and the sampling params (audio temperature, top_p, top_k).
Mutation operators: 35% regenerate the description (new intensity + manner adjectives), 20% swap the carrier sentence, 23% jitter λ by ±0.25/0.5, 12% jitter temperature ±0.1, 10% change top_k.
LoRA on vs off: the two LoRA OFF cards are baselines generated with the adapter disabled (λ=0) — a plain neutral prompt, and the best steering prompt without the LoRA. Every LoRA ON hall-of-fame recipe below was generated with the LoRA active at the evolved λ shown on the card. Seed is derived from the emotion name (deterministic).

Conclusions

Across 40 emotions the LoRA adds on average +0.295 target-emotion strength over the best prompt alone.

Most amplified by the LoRA: Emotional Numbness, Amusement, Fatigue Exhaustion, Sadness, Malevolence Malice, Fear, Pain, Astonishment Surprise.

Highest absolute expression reached: Emotional Numbness, Astonishment Surprise, Distress, Fear, Fatigue Exhaustion, Amusement, Sadness, Malevolence Malice.

Hardest to elicit even after evolution: Jealousy and Envy, Pride, Shame, Sourness, Contentment, Bitterness, Embarrassment, Thankfulness Gratitude.

emotion	neutral	prompt no-LoRA	evolved	LoRA lift	λ*
Emotional Numbness	0.05	0.01	0.60	+0.59	0.75
Astonishment Surprise	0.00	0.12	0.58	+0.45	1.5
Distress	0.00	0.18	0.56	+0.38	1.75
Fear	-0.00	0.04	0.55	+0.51	2.0
Fatigue Exhaustion	0.11	0.02	0.54	+0.52	2.0
Amusement	-0.00	0.01	0.53	+0.53	1.75
Sadness	0.00	0.00	0.52	+0.52	1.25
Malevolence Malice	0.01	0.01	0.52	+0.51	1.5
Anger	-0.00	0.20	0.48	+0.28	2.0
Relief	0.01	0.03	0.48	+0.45	2.0
Pain	-0.00	0.00	0.48	+0.48	2.0
Helplessness	-0.00	0.04	0.46	+0.41	2.0
Infatuation	-0.00	0.02	0.46	+0.43	1.0
Hope Enthusiasm Optimism	-0.00	0.17	0.45	+0.28	1.75
Impatience and Irritability	0.00	0.01	0.44	+0.43	2.0
Disgust	0.00	0.00	0.44	+0.44	2.0
Sexual Lust	-0.01	0.17	0.44	+0.27	1.5
Intoxication Altered States of Consciousness	-0.00	-0.00	0.43	+0.44	1.75
Elation	0.00	0.17	0.42	+0.25	1.5
Interest	0.14	0.39	0.42	+0.02	0.5
Disappointment	0.00	0.00	0.40	+0.40	0.5
Longing	0.00	0.26	0.38	+0.12	1.5
Triumph	-0.00	0.00	0.37	+0.37	1.75
Teasing	0.00	0.00	0.31	+0.31	1.75
Awe	0.00	0.00	0.30	+0.30	0.5
Pleasure Ecstasy	-0.00	0.13	0.30	+0.16	0.75
Confusion	-0.00	0.19	0.27	+0.08	2.0
Contemplation	0.00	0.02	0.26	+0.24	1.0
Doubt	0.00	0.20	0.23	+0.03	0.5
Concentration	0.11	0.02	0.22	+0.20	1.75
Contempt	-0.00	-0.00	0.21	+0.21	0.75
Affection	0.00	0.05	0.21	+0.16	1.0
Thankfulness Gratitude	0.01	0.01	0.18	+0.18	0.75
Embarrassment	-0.00	-0.00	0.18	+0.19	1.75
Bitterness	0.00	0.00	0.18	+0.18	1.0
Contentment	0.01	0.00	0.13	+0.13	1.0
Sourness	-0.00	-0.00	0.10	+0.10	1.25
Shame	0.00	0.00	0.10	+0.10	0.5
Pride	0.00	0.00	0.09	+0.09	0.75
Jealousy and Envy	0.01	0.01	0.09	+0.08	0.75

emotion

neutral

prompt no-LoRA

evolved

LoRA lift

λ*

Emotional Numbness

0.05

0.01

0.60

+0.59

0.75