ndwk

Lightweight, zero-delay, CPU-only real-time multilingual speech recognition (ASR) engine for Rust.

Pure C11 core with safe Rust FFI bindings. Prebuilt native libraries are automatically downloaded during build.

Supported Languages

• Japanese (ReazonSpeech Zipformer)
• English (NeMo Parakeet TDT v3)
• Chinese (Paraformer-large)
• Korean / Multilingual (SenseVoice Small)
• Automatic Language Identification (Whisper-tiny LID)

Quick Start

[dependencies]
ndwk = "0.1"

use ndwk::{NdwkEngine, NdwkLang};

let mut engine = NdwkEngine::new(
    "models",
    NdwkLang::Ja,
    true,
    |text| print!("\r[Partial] {text}"),
    |lang, text| println!("\r[{lang:?}] {text}"),
)?;

// Feed 16kHz mono f32 audio
engine.feed_audio(&samples);
engine.flush();

Requirements

• Models must be downloaded separately. See setup instructions.

Local Development

To use locally built libraries instead of downloading:

export NDWK_LIB_DIR=/path/to/ndwk/build
cargo build

Supported Platforms

License

Apache-2.0