Brainiall Voice (Pro tier)
Premium voice synthesis with zero-shot cloning, emotional control, and 99-language coverage. Studio-quality 48 kHz output. Sub-500 ms TTFT for real-time voice agents. Up to 83% cheaper than ElevenLabs Multilingual v2 at parity quality.
Interactive Speech Synthesis & Cloning Demo
Switch presets to test audio dynamic range, language prosody, and streaming time-to-first-byte (TTFT).
The Voice Infrastructure Problem
Traditional speech synthesis forces developers to choose between robotic low-quality endpoints or exorbitant per-character enterprise rates ($0.18 per 1K characters) that break conversational agent unit economics. Brainiall Voice provides uncompressed 48 kHz studio PCM, instant zero-shot voice cloning, and sub-500ms streaming chunks starting at $0.008 per 1K characters.
Two tiers, one API surface
Brainiall Voice ships as a single endpoint with two quality tiers selected per request via the tier parameter. Default is edge (12 English voices, 24 kHz, ~150 ms latency).
Set tier="pro" for cloning, emotional control, 99 languages, and 48 kHz studio output —
charged only on requests that opt in.
Edge tier (default)
12 curated English voices, 24 kHz mono, ~150 ms TTFT. CPU-friendly inference, the cheapest production-quality voice on the market. Drop-in for in-app TTS, IVR, alerts.
Pro tier (premium)
Zero-shot voice cloning, emotional control, 99 languages, 48 kHz studio output. ~500 ms TTFT with streaming chunks. Drop-in for audiobooks, branded voices, dubbing, voice agents.
Quickstart — clone a voice in two requests
Clone a voice identity and generate audio in two simple HTTP requests.
# 1. Create a voice clone from a 5-second reference audio clip
curl -X POST https://api.brainiall.com/v1/voice/clones \
-H "Authorization: Bearer $BRAINIALL_KEY" \
-F "name=brand_spokesperson" \
-F "audio=@reference_5s.wav"
# -> { "voice_id": "vc_a3f92b", "name": "brand_spokesperson", "ready": true }
# 2. Synthesize natural speech with emotional style directive
curl -X POST https://api.brainiall.com/v1/tts/synthesize \
-H "Authorization: Bearer $BRAINIALL_KEY" \
-H "Content-Type: application/json" \
-d '{
"text": "Welcome to our global platform launch.",
"voice": "vc_a3f92b",
"tier": "pro",
"language": "en",
"style": "warm",
"format": "wav_48khz"
}' \
--output speech.wavHonesty section — what Pro tier does NOT do
- Singing or musical performance.: Pro tier targets natural speech. Pitch control via
SSML
productsVoicePro.prosodyis supported, but not melodic singing. - Real-time sub-100 ms TTFT.: Pro tier streams chunks at ~500 ms TTFT. For agent use cases needing <200 ms first audio frame, use Edge tier (~150 ms TTFT).
- Voice cloning of public figures or copyrighted voices.: Voice clones require written consent of the source speaker (verified via attestation form during clone creation). Voices of public figures, deceased persons without estate consent, and characters from copyrighted media are blocked at the moderation layer.
- 100% factual emotional inference.: The
styleparameter is a directive, not a guarantee — extreme states (terror, ecstasy) lean toward subdued naturalistic interpretations to avoid uncanny output. - Sub-1 s end-to-end on the current CPU fleet.: The streaming time-to-first-byte numbers above (~150 ms Edge, ~500 ms Pro) describe when the first audio chunk leaves the server, not when the full utterance is rendered. On the CPU fleet, a warm short phrase finishes synthesizing in roughly 3.8 s and longer text scales with length. For frequently-reused content (IVR prompts, app alerts, voice-agent canned replies), cache the rendered audio on your side — the second hit is then a file fetch, not a synthesis.
Verified Performance & Methodology
All latency measurements reflect bare-metal dedicated GPU clusters with direct HTTP chunked transfer. Read full metrics on our Benchmark Methodology page.
Pricing
Edge tier
per 1K characters · 12 English voices · 24 kHz · ~150 ms TTFT
Pro tier
per 1K characters · cloning + emotional control · 99 languages · 48 kHz · ~500 ms TTFT
Voice clone
flat fee per clone · stored 90 days · unlimited synthesis from each clone
Volume tier
10M+ characters/month · dedicated rate · multi-region SLA · sales@brainiall.com