Amazon Polly examples using Amazon SDK for .NET - Amazon SDK for .NET
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Amazon Polly examples using Amazon SDK for .NET

The following code examples show you how to perform actions and implement common scenarios by using the Amazon SDK for .NET with Amazon Polly.

Actions are code excerpts that show you how to call individual service functions.

Scenarios are code examples that show you how to accomplish a specific task by calling multiple functions within the same service.

Each example includes a link to GitHub, where you can find instructions on how to set up and run the code in context.

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The following code example shows how to delete an Amazon Polly lexicon.

Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

using System; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class DeleteLexicon { public static async Task Main() { string lexiconName = "SampleLexicon"; var client = new AmazonPollyClient(); var success = await DeletePollyLexiconAsync(client, lexiconName); if (success) { Console.WriteLine($"Successfully deleted {lexiconName}."); } else { Console.WriteLine($"Could not delete {lexiconName}."); } } /// <summary> /// Deletes the named Amazon Polly lexicon. /// </summary> /// <param name="client">The initialized Amazon Polly client object.</param> /// <param name="lexiconName">The name of the Amazon Polly lexicon to /// delete.</param> /// <returns>A Boolean value indicating the success of the operation.</returns> public static async Task<bool> DeletePollyLexiconAsync( AmazonPollyClient client, string lexiconName) { var deleteLexiconRequest = new DeleteLexiconRequest() { Name = lexiconName, }; var response = await client.DeleteLexiconAsync(deleteLexiconRequest); return response.HttpStatusCode == System.Net.HttpStatusCode.OK; } }
  • For API details, see DeleteLexicon in Amazon SDK for .NET API Reference.

The following code example shows how to get an Amazon Polly lexicon.

Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

using System; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class GetLexicon { public static async Task Main(string[] args) { string lexiconName = "SampleLexicon"; var client = new AmazonPollyClient(); await GetPollyLexiconAsync(client, lexiconName); } public static async Task GetPollyLexiconAsync(AmazonPollyClient client, string lexiconName) { var getLexiconRequest = new GetLexiconRequest() { Name = lexiconName, }; try { var response = await client.GetLexiconAsync(getLexiconRequest); Console.WriteLine($"Lexicon:\n Name: {response.Lexicon.Name}"); Console.WriteLine($"Content: {response.Lexicon.Content}"); } catch (Exception ex) { Console.WriteLine("Error: " + ex.Message); } } }
  • For API details, see GetLexicon in Amazon SDK for .NET API Reference.

The following code example shows how to get Amazon Polly voices available for synthesis.

Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

using System; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class DescribeVoices { public static async Task Main() { var client = new AmazonPollyClient(); var allVoicesRequest = new DescribeVoicesRequest(); var enUsVoicesRequest = new DescribeVoicesRequest() { LanguageCode = "en-US", }; try { string nextToken; do { var allVoicesResponse = await client.DescribeVoicesAsync(allVoicesRequest); nextToken = allVoicesResponse.NextToken; allVoicesRequest.NextToken = nextToken; Console.WriteLine("\nAll voices: "); allVoicesResponse.Voices.ForEach(voice => { DisplayVoiceInfo(voice); }); } while (nextToken is not null); do { var enUsVoicesResponse = await client.DescribeVoicesAsync(enUsVoicesRequest); nextToken = enUsVoicesResponse.NextToken; enUsVoicesRequest.NextToken = nextToken; Console.WriteLine("\nen-US voices: "); enUsVoicesResponse.Voices.ForEach(voice => { DisplayVoiceInfo(voice); }); } while (nextToken is not null); } catch (Exception ex) { Console.WriteLine("Exception caught: " + ex.Message); } } public static void DisplayVoiceInfo(Voice voice) { Console.WriteLine($" Name: {voice.Name}\tGender: {voice.Gender}\tLanguageName: {voice.LanguageName}"); } }
  • For API details, see DescribeVoices in Amazon SDK for .NET API Reference.

The following code example shows how to list Amazon Polly pronunciation lexicons.

Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

using System; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class ListLexicons { public static async Task Main() { var client = new AmazonPollyClient(); var request = new ListLexiconsRequest(); try { Console.WriteLine("All voices: "); do { var response = await client.ListLexiconsAsync(request); request.NextToken = response.NextToken; response.Lexicons.ForEach(lexicon => { var attributes = lexicon.Attributes; Console.WriteLine($"Name: {lexicon.Name}"); Console.WriteLine($"\tAlphabet: {attributes.Alphabet}"); Console.WriteLine($"\tLanguageCode: {attributes.LanguageCode}"); Console.WriteLine($"\tLastModified: {attributes.LastModified}"); Console.WriteLine($"\tLexemesCount: {attributes.LexemesCount}"); Console.WriteLine($"\tLexiconArn: {attributes.LexiconArn}"); Console.WriteLine($"\tSize: {attributes.Size}"); }); } while (request.NextToken is not null); } catch (Exception ex) { Console.WriteLine($"Error: {ex.Message}"); } } }
  • For API details, see ListLexicons in Amazon SDK for .NET API Reference.

The following code example shows how to store an Amazon Polly pronunciation lexicon.

Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

using System; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class PutLexicon { public static async Task Main() { string lexiconContent = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + "<lexicon version=\"1.0\" xmlns=\"http://www.w3.org/2005/01/pronunciation-lexicon\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " + "xsi:schemaLocation=\"http://www.w3.org/2005/01/pronunciation-lexicon http://www.w3.org/TR/2007/CR-pronunciation-lexicon-20071212/pls.xsd\" " + "alphabet=\"ipa\" xml:lang=\"en-US\">" + "<lexeme><grapheme>test1</grapheme><alias>test2</alias></lexeme>" + "</lexicon>"; string lexiconName = "SampleLexicon"; var client = new AmazonPollyClient(); var putLexiconRequest = new PutLexiconRequest() { Name = lexiconName, Content = lexiconContent, }; try { var response = await client.PutLexiconAsync(putLexiconRequest); if (response.HttpStatusCode == System.Net.HttpStatusCode.OK) { Console.WriteLine($"Successfully created Lexicon: {lexiconName}."); } else { Console.WriteLine($"Could not create Lexicon: {lexiconName}."); } } catch (Exception ex) { Console.WriteLine("Exception caught: " + ex.Message); } } }
  • For API details, see PutLexicon in Amazon SDK for .NET API Reference.

The following code example shows how to synthesize speech from text with Amazon Polly.

Amazon SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

using System; using System.IO; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class SynthesizeSpeech { public static async Task Main() { string outputFileName = "speech.mp3"; string text = "Twas brillig, and the slithy toves did gyre and gimbol in the wabe"; var client = new AmazonPollyClient(); var response = await PollySynthesizeSpeech(client, text); WriteSpeechToStream(response.AudioStream, outputFileName); } /// <summary> /// Calls the Amazon Polly SynthesizeSpeechAsync method to convert text /// to speech. /// </summary> /// <param name="client">The Amazon Polly client object used to connect /// to the Amazon Polly service.</param> /// <param name="text">The text to convert to speech.</param> /// <returns>A SynthesizeSpeechResponse object that includes an AudioStream /// object with the converted text.</returns> private static async Task<SynthesizeSpeechResponse> PollySynthesizeSpeech(IAmazonPolly client, string text) { var synthesizeSpeechRequest = new SynthesizeSpeechRequest() { OutputFormat = OutputFormat.Mp3, VoiceId = VoiceId.Joanna, Text = text, }; var synthesizeSpeechResponse = await client.SynthesizeSpeechAsync(synthesizeSpeechRequest); return synthesizeSpeechResponse; } /// <summary> /// Writes the AudioStream returned from the call to /// SynthesizeSpeechAsync to a file in MP3 format. /// </summary> /// <param name="audioStream">The AudioStream returned from the /// call to the SynthesizeSpeechAsync method.</param> /// <param name="outputFileName">The full path to the file in which to /// save the audio stream.</param> private static void WriteSpeechToStream(Stream audioStream, string outputFileName) { var outputStream = new FileStream( outputFileName, FileMode.Create, FileAccess.Write); byte[] buffer = new byte[2 * 1024]; int readBytes; while ((readBytes = audioStream.Read(buffer, 0, 2 * 1024)) > 0) { outputStream.Write(buffer, 0, readBytes); } // Flushes the buffer to avoid losing the last second or so of // the synthesized text. outputStream.Flush(); Console.WriteLine($"Saved {outputFileName} to disk."); } }

Synthesize speech from text using speech marks with Amazon Polly using an Amazon SDK.

using System; using System.Collections.Generic; using System.IO; using System.Threading.Tasks; using Amazon.Polly; using Amazon.Polly.Model; public class SynthesizeSpeechMarks { public static async Task Main() { var client = new AmazonPollyClient(); string outputFileName = "speechMarks.json"; var synthesizeSpeechRequest = new SynthesizeSpeechRequest() { OutputFormat = OutputFormat.Json, SpeechMarkTypes = new List<string> { SpeechMarkType.Viseme, SpeechMarkType.Word, }, VoiceId = VoiceId.Joanna, Text = "This is a sample text to be synthesized.", }; try { using (var outputStream = new FileStream(outputFileName, FileMode.Create, FileAccess.Write)) { var synthesizeSpeechResponse = await client.SynthesizeSpeechAsync(synthesizeSpeechRequest); var buffer = new byte[2 * 1024]; int readBytes; var inputStream = synthesizeSpeechResponse.AudioStream; while ((readBytes = inputStream.Read(buffer, 0, 2 * 1024)) > 0) { outputStream.Write(buffer, 0, readBytes); } } } catch (Exception ex) { Console.WriteLine($"Error: {ex.Message}"); } } }