如何使用Microsoft Azure语音翻译收听系统语音，不收听麦克风，我使用C＃

Question

我想使用MicroSoft Azure支持语音识别翻译API。 关于此链接：https://azure.microsoft.com/zh-cn/services/cognitive-services/translator-speech-api/

它仅使用麦克风收听声音，但这不是我的希望。我只想自己听系统声音。没有来自麦克风的声音听环境噪音

  // Translation from microphone.
    public static async Task TranslationWithMicrophoneAsync()
    {
        // <TranslationWithMicrophoneAsync>
        // Translation source language.
        // Replace with a language of your choice.
        string fromLanguage = "en-US";

        // Voice name of synthesis output.
        const string GermanVoice = "Microsoft Server Speech Text to Speech Voice (de-DE, Hedda)";

        // Creates an instance of a speech translation config with specified subscription key and service region.
        // Replace with your own subscription key and service region (e.g., "westus").
        var config = SpeechTranslationConfig.FromSubscription("YourSubscriptionKey", "YourServiceRegion");
        config.SpeechRecognitionLanguage = fromLanguage;
        config.VoiceName = GermanVoice;

        // Translation target language(s).
        // Replace with language(s) of your choice.
        config.AddTargetLanguage("de");

        // Creates a translation recognizer using microphone as audio input.
        using (var recognizer = new TranslationRecognizer(config))
        {
            // Subscribes to events.
            recognizer.Recognizing += (s, e) =>
            {
                Console.WriteLine($"RECOGNIZING in '{fromLanguage}': Text={e.Result.Text}");
                foreach (var element in e.Result.Translations)
                {
                    Console.WriteLine($"    TRANSLATING into '{element.Key}': {element.Value}");
                }
            };

            recognizer.Recognized += (s, e) =>
            {
                if (e.Result.Reason == ResultReason.TranslatedSpeech)
                {
                    Console.WriteLine($"RECOGNIZED in '{fromLanguage}': Text={e.Result.Text}");
                    foreach (var element in e.Result.Translations)
                    {
                        Console.WriteLine($"    TRANSLATED into '{element.Key}': {element.Value}");
                    }
                }
                else if (e.Result.Reason == ResultReason.RecognizedSpeech)
                {
                    Console.WriteLine($"RECOGNIZED: Text={e.Result.Text}");
                    Console.WriteLine($"    Speech not translated.");
                }
                else if (e.Result.Reason == ResultReason.NoMatch)
                {
                    Console.WriteLine($"NOMATCH: Speech could not be recognized.");
                }
            };

            recognizer.Synthesizing += (s, e) =>
            {
                var audio = e.Result.GetAudio();
                Console.WriteLine(audio.Length != 0
                    ? $"AudioSize: {audio.Length}"
                    : $"AudioSize: {audio.Length} (end of synthesis data)");

                if (audio.Length > 0)
                {
                    #if NET461
                    using (var m = new MemoryStream(audio))
                    {
                        SoundPlayer simpleSound = new SoundPlayer(m);
                        simpleSound.PlaySync();
                    }
                    #endif
                }
            };

            recognizer.Canceled += (s, e) =>
            {
                Console.WriteLine($"CANCELED: Reason={e.Reason}");

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

            recognizer.SessionStarted += (s, e) =>
            {
                Console.WriteLine("\nSession started event.");
            };

            recognizer.SessionStopped += (s, e) =>
            {
                Console.WriteLine("\nSession stopped event.");
            };

            // Starts continuous recognition. Uses StopContinuousRecognitionAsync() to stop recognition.
            Console.WriteLine("Say something...");
            await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);

            do
            {
                Console.WriteLine("Press Enter to stop");
            } while (Console.ReadKey().Key != ConsoleKey.Enter);

            // Stops continuous recognition.
            await recognizer.StopContinuousRecognitionAsync().ConfigureAwait(false);
        }
        // </TranslationWithMicrophoneAsync>
    }