Text-to-speech
Set up the backend
If you haven't already done so, run amplify init inside your project and then amplify add auth (we recommend selecting the default configuration).
Run amplify add predictions, then use the following answers:
? Please select from one of the categories below Identify❯ Convert Interpret Infer Learn More ? What would you like to convert? Translate text into a different language❯ Generate speech audio from text Transcribe text from audio
? Provide a friendly name for your resource <Enter a friendly name here> ? What is the source language? (Use arrow keys) <Select your default source language>
? Select a speaker (Use arrow keys) <Select your default speaker voice> ? Who should have access? Auth users only❯ Auth and Guest usersRun amplify push to create the resources in the cloud
Working with the API
Here is an example of converting text to speech. In order to override any choices you made while adding this resource using the Amplify CLI, you can pass in a voice in the options object as shown below.
import Amplifyimport AWSPredictionsPluginimport AVFoundation
//...
var player: AVAudioPlayer?
//...
func textToSpeech(text: String) { let options = PredictionsTextToSpeechRequest.Options( voiceType: .englishFemaleIvy, pluginOptions: nil )
Amplify.Predictions.convert(textToSpeech: text, options: options) { event in switch event { case let .success(result): print(result.audioData) self.player = try? AVAudioPlayer(data: result.audioData) if let player = self.player { player.play() } case let .failure(error): print(error) } }}import Amplifyimport AWSPredictionsPluginimport AVFoundation
//...
var player: AVAudioPlayer?var textToSpeechSink: AnyCancellable?
//...
func textToSpeech(text: String) { let options = PredictionsTextToSpeechRequest.Options( voiceType: .englishFemaleIvy, pluginOptions: nil )
textToSpeechSink = Amplify.Predictions.convert(textToSpeech: text, options: options) .resultPublisher .sink { if case let .failure(error) = $0 { print(error) } } receiveValue: { result in print(result.audioData) self.player = try? AVAudioPlayer(data: result.audioData) if let player = self.player { player.play() } }}As a result of running this code, you will hear audio of the text being emitted from your device.