.net framework 用多个声卡向多个音响同时播放不同文本语音

以下是一个使用NAudio库在C#中实现多个声卡向多个音响同时播放不同文本语音的示例：

using System;
using System.Collections.Generic;
using System.Speech.Synthesis;
using NAudio.Wave;

namespace MultiSoundCardPlayer
{
    class Program
    {
        static void Main(string[] args)
        {
            List<WaveOutEvent> soundCards = new List<WaveOutEvent>();
            List<SpeechSynthesizer> speechSynthesizers = new List<SpeechSynthesizer>();
            List<string> texts = new List<string>{"Hello", "world", "This", "is", "a", "test"};

            // 打开多个声卡，创建多个实例
            for (int i = 0; i < WaveOut.DeviceCount; i++)
            {
                WaveOutCapabilities capabilities = WaveOut.GetCapabilities(i);
                Console.WriteLine($"Device {i}: {capabilities.ProductName}");

                WaveOutEvent soundCard = new WaveOutEvent();
                soundCard.DeviceNumber = i;
                soundCards.Add(soundCard);

                SpeechSynthesizer speechSynthesizer = new SpeechSynthesizer();
                speechSynthesizers.Add(speechSynthesizer);
            }

            // 播放多个文本语音
            for (int i = 0; i < soundCards.Count; i++)
            {
                WaveOutEvent soundCard = soundCards[i];
                SpeechSynthesizer speechSynthesizer = speechSynthesizers[i];
                string text = texts[i % texts.Count];

                // 配置Text-to-Speech引擎
                speechSynthesizer.SelectVoiceByHints(VoiceGender.Female);
                speechSynthesizer.Rate = -2;
                speechSynthesizer.Volume = 100;

                // 合成音频数据
                var ms = new System.IO.MemoryStream();
                speechSynthesizer.SetOutputToWaveStream(ms);
                speechSynthesizer.Speak(text);
                ms.Position = 0;

                // 写入声卡缓冲区
                var waveProvider = new RawSourceWaveStream(ms, new WaveFormat(16000, 16, 1));
                soundCard.Init(waveProvider);
                soundCard.Play();
            }

            Console.ReadKey();

            // 关闭声卡
            foreach (var soundCard in soundCards)
            {
                soundCard.Stop();
                soundCard.Dispose();
            }

            // 关闭Text-to-Speech引擎
            foreach (var speechSynthesizer in speechSynthesizers)
            {
                speechSynthesizer.Dispose();
            }
        }
    }
}

该示例首先打开多个声卡，并创建多个实例。然后，它使用SpeechSynthesizer类将多个文本合成为音频数据，并将它们写入对应的声卡缓冲区中。最后，它通过按任意键来关闭声卡并释放资源。

需要注意的是，不同的声卡可能有不同的设置要求，您需要确保每个声卡的设置正确，并且音频数据格式相同。此外，Text-to-Speech引擎的语音合成质量也会影响最终的音质，您需要根据自己的需求选择合适的引擎。