AWS SDK for Go
Developer Guide

Synthesizing Speech

This example uses the SynthesizeSpeech operation to get the text from a file and produce an MP3 file containing the synthesized speech.

Choose Copy to save the code locally.

Create the file pollySynthesizeSpeech.go. Import the packages used in the example.

import ( "" "" "" "fmt" "os" "strings" "io" "io/ioutil" )

Get the name of the text file from the command line.

if len(os.Args) != 2 { fmt.Println("You must supply an alarm name") os.Exit(1) } fileName := os.Args[1]

Open the text file and read the contents as a string.

contents, err := ioutil.ReadFile(fileName) s := string(contents[:])

Initialize a session that the SDK will use to load credentials from the shared credentials file ~/.aws/credentials, load your configuration from the shared configuration file ~/.aws/config, and create an Amazon Polly client.

sess := session.Must(session.NewSessionWithOptions(session.Options{ SharedConfigState: session.SharedConfigEnable, })) svc := polly.New(sess)

Create the input for and call SynthesizeSpeech.

input := &polly.SynthesizeSpeechInput{OutputFormat: aws.String("mp3"), Text: aws.String(s), VoiceId: aws.String("Joanna")} output, err := svc.SynthesizeSpeech(input)

Save the resulting synthesized speech as an MP3 file.

names := strings.Split(fileName, ".") name := names[0] mp3File := name + ".mp3" outFile, err := os.Create(mp3File) defer outFile.Close()


The resulting MP3 file is in the MPEG-2 format.

See the complete example on GitHub.