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Cobra VAD — iOS Quick Start


Platforms

  • iOS (11.0+)

Requirements

  • Xcode
  • CocoaPods

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 Xcode .

  2. Install CocoaPods

  3. Import the Cobra-iOS binding by adding the following line to Podfile:

pod 'Cobra-iOS'
  1. Run the following from the project directory:
pod install
  1. Add the following to the app's Info.plist file to enable recording with an iOS device's microphone
<key>NSMicrophoneUsageDescription</key>
<string>[Permission explanation]</string>

Usage

Create an instance of the Cobra VAD engine:

import Cobra
do {
cobra = try Cobra(accessKey: "${ACCESS_KEY}")
} catch { }

Pass in frames of audio to the .process function:

func getNextAudioFrame() -> [Int16] {
return audioFrame;
}
while true {
do {
let voiceProbability = try cobra.process(getNextAudioFrame())
// take action based on the probability of voice
} catch { }
}

Release resources explicitly when done with Cobra:

cobra.delete()

Demo

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

Setup

Clone the Repository

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

Usage

  1. Install dependencies:
cd cobra/demo/ios/CobraDemo
pod install
  1. Replace let ACCESS_KEY = "${YOUR_ACCESS_KEY_HERE}" in the file ViewModel.swift with a valid AccessKey.

  2. Open the CobraDemo XCode project and run the demo.

For more information on our Cobra demos for iOS, head over to our GitHub repository .

Resources

Package

  • Cobra-iOS on Cocoapods

API

  • Cobra-iOS API Docs

GitHub

  • Cobra iOS SDK on GitHub
  • Cobra iOS Demos on GitHub

Benchmark

  • Voice Activity Benchmark

Further Reading

  • Yet Another Voice Activity Detection Engine

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