c# - SpeakSsmlAsync 返回 BadRequest

Question

调用SpeakSsmlAsync（Microsoft Speech SDK）时，返回如下错误信息：

> CANCELED: Reason=Error
> CANCELED: ErrorCode=BadRequest 
> CANCELED: ErrorDetails=[HTTPAPI result code = HTTPAPI_OK. HTTP status code=400.] 
> CANCELED: Did you update the subscription info?

重现步骤：

1. 从https://github.com/Azure-Samples/cognitive-services-speech-sdk/tree/master/quickstart/text-to-speech/csharp-dotnet-windows下载快速入门示例

2. 用自己的值替换订阅 ID 和区域，按照文档中的描述设置活动配置，清理并重建项目

3. 启动程序并输入一些文本，如“abracadabra”

   --> 工作正常（使用SpeakTextAsync）

4. 替换SpeakTextAsync为SpeakSsmlAsync

5. 启动程序并输入一些文本

   --> 错误代码=错误请求

6. 使用正确的 SSML 代码重试，例如<speak version="1.0" xmlns="https://www.w3.org/2001/10/synthesis" xml:lang="en-US">abracadabra</speak>“

   --> 错误代码=错误请求

系统

• .NET 框架 4.6.1
• Windows 10 内部版本 17134
• 服务区域 = “西欧”

代码

using System;
using System.Threading.Tasks;
using Microsoft.CognitiveServices.Speech;

namespace helloworld
{
    class Program
    {

        private static string endpointSpeechKey = "<MyOwnServiceKey>";
        private static string region = "westeurope";

        public static async Task SynthesisToSpeakerAsync()
        {
            var config = SpeechConfig.FromSubscription(endpointSpeechKey, region);
            using (var synthesizer = new SpeechSynthesizer(config))
            {
                Console.WriteLine("Type some text that you want to speak...");
                Console.Write("> ");
                string text = Console.ReadLine();

                using (var result = await synthesizer.SpeakSsmlAsync(text))
                {
                    if (result.Reason == ResultReason.SynthesizingAudioCompleted)
                    {
                        Console.WriteLine($"Speech synthesized to speaker for text [{text}]");
                    }
                    else if (result.Reason == ResultReason.Canceled)
                    {
                        var cancellation = SpeechSynthesisCancellationDetails.FromResult(result);
                        Console.WriteLine($"CANCELED: Reason={cancellation.Reason}");

                        if (cancellation.Reason == CancellationReason.Error)
                        {
                            Console.WriteLine($"CANCELED: ErrorCode={cancellation.ErrorCode}");
                            Console.WriteLine($"CANCELED: ErrorDetails=[{cancellation.ErrorDetails}]");
                            Console.WriteLine($"CANCELED: Did you update the subscription info?");
                        }
                    }
                }

                // This is to give some time for the speaker to finish playing back the audio
                Console.WriteLine("Press any key to exit...");
                Console.ReadKey();
            }
        }

        static void Main()
        {
            SynthesisToSpeakerAsync().Wait();
        }
    }
}

调试截图

Answer 1

Azure 似乎仅在包含语音标签时才接受 SSML。否则你会得到 http-400-error。

使用下面的代码调用 SpeakSsmlAsync 成功：

text = @"<speak version='1.0' xmlns='https://www.w3.org/2001/10/synthesis' xml:lang='en-US'><voice name='en-US-ZiraRUS'>abracadabra</voice></speak>";
using (var result = await synthesizer.SpeakSsmlAsync(text))

搜索 Microsoft SSML 时要小心。之间有区别

https://docs.microsoft.com/en-us/azure/cognitive-services/speech-service/speech-synthesis-markup

（这是您在针对 Azure 语音服务进行编程时想要的）和

https://docs.microsoft.com/en-us/cortana/skills/speech-synthesis-markup-language

Answer 2

是的，Azure TTS 服务只接受带有语音标签的 SSML。

原因是语音太多，所以最好明确指定使用哪个语音。