Unity使用微软SDK实现文字转语音

本文将通过使用微软语音服务SDK实现文字到语音的转换

1、首先从微软官方网站现在SDK包，然后将SDK包导入新建的项目里 

2、新建项目里添加一个InputField文本输入框和一个按钮即可，然后再新建一个脚本命名为TTSDemo，挂在一个物体上即可，如图

3、TTSDemo代码如下：

using Microsoft.CognitiveServices.Speech;
using Microsoft.CognitiveServices.Speech.Audio;
using UnityEngine;
using UnityEngine.UI;

public class TTSDemo : MonoBehaviour
{
    public InputField inputField;
    public Button speakButton;
    public AudioSource audioSource;

    private string message;
    public string path;
    public string fileName;
    public string audioType;
    void Start()
    {
        if (inputField == null)
        {
            message = "inputField property is null! Assign a UI InputField element to it.";
            UnityEngine.Debug.LogError(message);
        }
        else if (speakButton == null)
        {
            message = "speakButton property is null! Assign a UI Button to it.";
            UnityEngine.Debug.LogError(message);
        }
        else
        {
            speakButton.onClick.AddListener(ButtonClick);
        }
    }

    public async void ButtonClick()
    {
        //string xmlPath = Application.dataPath + "/SpeechConfig/ZHCN.xml";
        var config = SpeechConfig.FromSubscription("xxxxx", "eastus");
        //config.SpeechSynthesisLanguage = "zh-CN";
        //config.SpeechSynthesisVoiceName = "zh-CN-XiaoyouNeural";
        var audioConfig = AudioConfig.FromWavFileInput("E:/FirstAudio.wav");

        using (var synthsizer = new SpeechSynthesizer(config, audioConfig))
        {

            var result = synthsizer.SpeakTextAsync(inputField.text).Result;
            //var xmlConfig = File.ReadAllText(Application.dataPath + "/SpeechConfig/ZHCN.xml");
            //var result = await synthsizer.SpeakSsmlAsync(xmlConfig);
            string newMessage = string.Empty;
            if (result.Reason == ResultReason.SynthesizingAudioCompleted)
            {
                var sampleCount = result.AudioData.Length / 2;
                var audioData = new float[sampleCount];
                for (var i = 0; i < sampleCount; ++i)
                {
                    audioData[i] = (short)(result.AudioData[i * 2 + 1] << 8 | result.AudioData[i * 2]) / 32768.0F;

                }
                // The default output audio format is 16K 16bit mono
                var audioClip = AudioClip.Create("SynthesizedAudio", sampleCount, 1, 16000, false);
                audioClip.SetData(audioData, 0);
                audioSource.clip = audioClip;
                audioSource.Play();

                newMessage = "Speech synthesis succeeded!";
                Debug.Log(newMessage);
            }

            else if (result.Reason == ResultReason.Canceled)
            {
                var cancellation = SpeechSynthesisCancellationDetails.FromResult(result);
                //newMessage = $"CANCELED:nReason=[{cancellation.Reason}]nErrorDetails=[{cancellation.ErrorDetails}]nDid you update the subscription info?";
                Debug.LogError(cancellation.ErrorDetails);
            }
        }
    }
}

4、代码详解 

var config = SpeechConfig.FromSubscription("xxxxx", "eastus"); “xxxxx”就是你自己的密钥；“eastus”是区域语言(美国东部、美国西部等等)， 此值代表美国东部

 如果用“eastus” InputField文本框里就只能输入英语，生成英语语音片段，不然就会报错。那么有同学会问如果要生成汉语语音怎么办：

//config.SpeechSynthesisLanguage = "zh-CN";
//config.SpeechSynthesisVoiceName = "zh-CN-XiaoyouNeural";

把这两行代码放开即可

config.SpeechSynthesisLanguage是地区，"zh-CN"代表中国

config.SpeechSynthesisVoiceName 是音色，本文用的是女声Xiaoyou

地区、音色、语音情感等参数见微软官方文档这里

using (var synthsizer = new SpeechSynthesizer(config, audioConfig)) 第1个参数是上面所解释的生成语音所需要的参数集合，第2个参数是语音存储位置和名称、类型

5、报错详览

 这种错误代表你从文字生成出来的语音是空的，记住用“eastus”就只能输入英语，不然就会报空。

这种401错误是你密钥没有验证通过，没连到SDK服务