Voice agent teams constantly run into the same bottleneck: the voice catalog is limited, yet every brief asks for a sound that simply isn’t there—whether it’s a Quebecoise receptionist for a Montreal dealership, a sixty‑year‑old narrator with lecture‑hall authority, or any other specific regional accent, age, gender, tone, or use case. Building those voices the traditional way means sourcing talent, securing consent, clearing licences, and cloning one speaker at a time—a slow, costly process that never scales to match the volume of briefs.
Gradium’s Voice Design changes that equation. Instead of searching a library, you give the system a plain‑language description—gender, age band, accent or origin, pitch, pace, energy, timbre, register, manner, and the job the voice will perform. The model expands that brief internally and returns one to five fully formed candidate voices in three to five seconds, with no reference audio, no speaker to clear, and no rights to manage.
Deploying the result is straightforward. Candidates are accessed through the same streaming Text‑to‑Speech endpoint as any catalog voice, preserving latency and output formats. To move from audition to production, you call the voice‑generator to mint candidates, poll until they’re ready, test them via the normal TTS endpoint (REST only, 100‑character audition cap), and then promote the chosen one with a single conversion call. Conversion is free, removes the 30‑day expiry, and occupies one custom‑voice slot—shared with clones—so the free tier still supports five permanent voices and paid plans scale to a thousand.
Because the description is expanded before sampling, even identical prompts with a fixed seed yield different voices, encouraging rapid iteration until the perfect match is found. The solution eliminates sourcing headaches, cuts licensing overhead, and lets teams ship bespoke voices on demand, keeping pace with the ever‑growing list of casting briefs.
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