Porcupine Wake Word
Rust Quick Start

Platforms

• Linux (x86_64)
• macOS (x86_64, arm64)
• Windows (x86_64)
• BeagleBone
• NVIDIA Jetson Nano
• Raspberry Pi (Zero, 2, 3, 4)

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_porcupine to the Cargo.toml manifest:

[dependencies]
pv_porcupine = "*"

Usage

Create an instance of Porcupine that detects the included built-in wake words porcupine and bumblebee:

use porcupine::{Porcupine, BuiltinKeywords, PorcupineBuilder};

let porcupine: Porcupine = PorcupineBuilder::new_with_keywords(
    "${ACCESS_KEY}", 
    &[BuiltinKeywords::Porcupine, BuiltinKeywords::Bumblebee],
)
.init()
.expect("Unable to create Porcupine");

Pass in frames of audio to the .process function:

fn next_audio_frame() -> Vec<i16> {
    // ..
}

loop {
    let audio_frame: Vec<i16> = next_audio_frame();
    if let Ok(keyword_index) = porcupine.process(&audio_frame) {
        if keyword_index == 0 {
            // `porcupine` detected
        } else if keyword_index == 1 {
            // `bumblebee` detected
        }   
    }
}

Custom Keywords

Create custom keywords using the Picovoice Console . Download the custom wake word file (.ppn) and create an instance of Porcupine using the new_with_keyword_paths builder method:

let porcupine: Porcupine = PorcupineBuilder::new_with_keyword_paths(
    "${ACCESS_KEY}", 
    &["${KEYWORD_FILE_PATH}"],
)
.init()
.expect("Unable to create Porcupine");

Non-English Languages

Use the corresponding model file (.pv) to detect non-English wake words. The model files for all supported languages are available on the Porcupine GitHub repository .

Pass in the model file using the model_path builder method to change the detection language:

let porcupine: Porcupine = PorcupineBuilder::new_with_keyword_paths(
    "${ACCESS_KEY}", 
    &["${KEYWORD_FILE_PATH}"],
)
.model_path("${MODEL_FILE_PATH}")
.init()
.expect("Unable to create Porcupine");

Demo

For the Porcupine Rust SDK, we offer demo applications that demonstrate how to use the Wake Word engine on real-time audio streams (i.e. microphone input) and audio files.

Setup

Clone the Porcupine GitHub Repository :

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

Usage

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

cd porcupine/demo/rust/micdemo
cargo run --release -- --help

Ensure you have a working microphone connected to your system and run the following command to detect the built-in keyword porcupine:

cargo run --release -- --access_key "${ACCESS_KEY}" --keywords porcupine

For more information on our Porcupine demos for Rust, head over to our GitHub repository .

Resources