User asked for a bit faster speech. Pitch shift is already disabled, so the
earlier "monster voice" risk from stacking pitch on a fast base is gone — a
modest 1.15x base is natural. Emotion multipliers scale off base, so every
emotion gets the bump too. Also adds tests/gen_emotion_samples.py, a dev
utility that synthesizes one clip per canonical emotion (announce name at
neutral speed, then a sample sentence steered by that emotion's tag) and
stitches them into a single wav for auditioning the emotion palette.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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