Cobra VAD — Python Quick Start

Platforms

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

Requirements

• Picovoice Account & AccessKey
• Python 3.7+
• PIP

Picovoice Account & AccessKey

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

Quick Start

Setup

1. Install Python 3.

2. Install the pvcobra Python package using PIP:

pip3 install pvcobra

Usage

Create an instance of the Cobra Voice Activity Detection engine:

import pvcobra

cobra = pvcobra.create(access_key='${ACCESS_KEY}')

Pass in frames of audio to the .process function:

def get_next_audio_frame():
    pass

while True:
    audio_frame = get_next_audio_frame()
    voice_probability = cobra.process(audio_frame)

Release resources explicitly when done with Cobra Voice Activity Detection:

cobra.delete()

Demo

For the Cobra Voice Activity Detection Python 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

Install the pvcobrademo Python package using PIP:

pip3 install pvcobrademo

This package installs command-line utilities for the Cobra Voice Activity Detection Python demos.

Usage

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

cobra_demo_mic --help

Ensure you have a working microphone connected to your system and run the following command to detect voice activity:

cobra_demo_mic --access_key ${ACCESS_KEY}

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

Resources