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Cobra VAD — Rust Quick Start

Rust SDKs will no longer be maintained after July 15, 2025. If you plan to use the Cobra VAD — Rust Quick Start Rust SDK for commercial purposes, please contact us.

Platforms

  • Linux (x86_64)
  • macOS (x86_64, arm64)
  • Windows (x86_64)
  • Raspberry Pi (Zero, 3, 4, 5)

Requirements

  • Picovoice Account & AccessKey
  • Rust 1.54+
  • Cargo

Picovoice Account & AccessKey

Signup or Login to Picovoice Console to get your AccessKey. Make sure to keep your AccessKey secret.

Quick Start

Setup

  1. Download and install Rust.

  2. Add pv_cobra to the Cargo.toml manifest:

[dependencies]
pv_cobra = "*"

Usage

Create an instance of the Cobra Voice Activity Detection engine:

use cobra::Cobra;
let cobra = Cobra::new("${ACCESS_KEY}");

Pass in frames of audio to the .process function:

fn next_audio_frame() -> Vec<i16> {
// get audio frame
}
loop {
if let Ok(voice_probability) = cobra.process(&next_audio_frame()) {
// ...
}
}

Demo

For the Cobra Voice Activity Detection Rust SDK, we offer demo applications that demonstrate how to use the VAD engine on real-time audio streams (i.e. microphone input) and audio files.

Setup

Clone the Cobra Voice Activity Detection repository from GitHub using HTTPS:

git clone --recurse-submodules https://github.com/Picovoice/cobra.git

Usage

Use the --help flag to see the usage options for the demo:

cobra/demo/rust/micdemo
cargo run --release -- --help

Run the following command to detect voice activity:

cargo run --release -- --access_key ${ACCESS_KEY}

For more information on our Cobra Voice Activity Detection demos for Rust, head over to our GitHub repository.

Resources

Package

  • pv_cobra on crates.io

API

  • pv_cobra Rust API Docs

GitHub

  • Cobra Voice Activity Detection Rust SDK on GitHub
  • Cobra Voice Activity Detection Rust Demos on GitHub

Benchmark

  • Voice Activity Benchmark

Further Reading

  • Yet Another Voice Activity Detection Engine

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