Introducing Suzune S1: Ultra-Fast 80M Parameter Non-Autoregressive Speech Foundation Model
- Ultra-compact 80-million parameter non-autoregressive TTS architecture
- Sub-20ms Time-To-First-Audio (TTFA) with RTF 0.018x on GPU and 0.087x on x86 CPU
- Strictly constant ~320 MB VRAM footprint with zero KV cache growth
- Bilingual English and Hindi expressive voice generation
Sorika Labs is proud to announce Suzune S1 — an ultra-lightweight, broadcast-grade 80M parameter non-autoregressive Text-to-Speech (TTS) engine designed for real-time conversational agents, phone systems, and edge devices.
Deterministic Real-Time Synthesis
Zero phonetic hallucinations and sub-20ms streaming.
Unlike large discrete audio LLMs that generate speech sequentially token-by-token (causing word skipping and multi-second lag), Suzune S1 generates audio through parallel multi-band Inverse Short-Time Fourier Transform (iSTFTNet) prediction.
Combined with a customized 12-layer Phoneme-Level ALBERT (PL-BERT) and Neural Source Filter (NSF) harmonic excitation, Suzune S1 generates crystal-clear 24kHz audio with natural breath cadence, micro-pauses, and emotional dynamics.
“Suzune S1 gives conversational voice AI what it has always lacked: true instant duplex responsiveness. When you speak, Suzune responds in under 20 milliseconds without stutters or skipped words.”
— Darsh Yadav — Founder & Research LeadEmpirical Performance & Efficiency
Benchmarked against industrial baselines.
In subjective listening evaluations, Suzune S1 achieved a Mean Opinion Score (MOS) of 4.38 ± 0.06, rivaling closed-source commercial APIs while reducing compute and memory costs by more than 85%.
Streaming WebSocket Audio API
Live audio streaming for real-time applications.
Suzune S1 supports direct chunked WebSocket streaming for ultra-low latency interactive voice response (IVR) and AI assistants:
import { SorikaAudioStream } from "@sorika/voice";
const voice = new SorikaAudioStream({
apiKey: process.env.SORIKA_API_KEY,
model: "suzune-s1-24k",
emotion: "empathetic",
language: "en-US"
});
await voice.stream("Hello! Suzune S1 delivers real-time voice streaming.", (chunk) => {
audioContext.playChunk(chunk); // TTFA: < 20ms
});