sherpa-onnx https://github.com/k2-fsa/sherpa-onnx
相關dll和lib庫拷進Unity，官方示例代碼稍作修改

using SherpaOnnx;
using System;
using System.IO;
using System.Runtime.InteropServices;
using UnityEngine;public class TTS : MonoBehaviour
{public string Model = "vits-zh-aishell3/vits-aishell3.onnx";public string Lexicon = "vits-zh-aishell3/lexicon.txt";public string Tokens = "vits-zh-aishell3/tokens.txt";public string DataDir = "";public string DictDir = "";public string RuleFsts = "vits-zh-aishell3/rule.far";public int SpeakerId = 99;// Start is called before the first frame updatevoid Start(){try{OfflineTtsConfig config = new OfflineTtsConfig();config.Model.Vits.Model = Path.Combine(Application.streamingAssetsPath, Model);config.Model.Vits.Lexicon = Path.Combine(Application.streamingAssetsPath, Lexicon);config.Model.Vits.Tokens = Path.Combine(Application.streamingAssetsPath, Tokens);//config.Model.Vits.DataDir = Path.Combine(Application.streamingAssetsPath, DataDir);//config.Model.Vits.DictDir = Path.Combine(Application.streamingAssetsPath, DictDir);config.Model.Vits.NoiseScale = 0.667f;config.Model.Vits.NoiseScaleW = 0.8f;config.Model.Vits.LengthScale = 1f;config.Model.NumThreads = 1;config.Model.Debug = 0;config.Model.Provider = "cpu";config.RuleFsts = Application.streamingAssetsPath + "/vits-zh-aishell3/phone.fst" + ","+ Application.streamingAssetsPath + "/vits-zh-aishell3/date.fst" + ","+ Application.streamingAssetsPath + "/vits-zh-aishell3/number.fst";config.MaxNumSentences = 1;OfflineTts tts = new OfflineTts(config);OfflineTtsCallback callback = new OfflineTtsCallback(MyCallback);OfflineTtsGeneratedAudio audio = tts.GenerateWithCallback("這是一個語音合成測試", 1, SpeakerId, callback);bool ok = audio.SaveToWaveFile(Application.streamingAssetsPath + "/test.wav");if (ok){Debug.Log("succeeded!");}else{Debug.Log("Failed");}}catch (Exception e){Debug.LogError(e);}}void MyCallback(IntPtr samples, int n){float[] data = new float[n];Marshal.Copy(samples, data, 0, n);//Debug.Log("n:" + n);}// Update is called once per framevoid Update(){}
}

不知為何生成的音頻是8000HZ的……
24.5.15添加了方便測試的UI

最后，案發現場在https://gitee.com/awnuxcvbn/usherpa-onnx-tts.git