How do i set up the audioConfig right with my Microphone?

Hey,

im trying to set up a recognizer in order to record my microphone. The mic gets detected and the session starts. Buts thats it.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.CognitiveServices.Speech;
using Microsoft.CognitiveServices.Speech.Audio;
using UnityEngine.Audio;

public class MicrosoftVoiceRecognition : MonoBehaviour
{
//task completion source to stop recording mic
private static TaskCompletionSource<int> stopRecognition = new TaskCompletionSource<int>();

private AudioSource audioSource;

public AudioMixerGroup mixerGroupMicrophone, mixerGroupMaster;

void Start()
{
    if (Microphone.devices.Length > 0)
    {
        FromMic();
    }
    else
    {
        Debug.Log("No mic detected!");
    }

}

public async Task FromMic()
{
    var speechConfig = SpeechConfig.FromSubscription(keyValue, region);

    stopRecognition = new TaskCompletionSource<int>();

    using (var audioConfig = AudioConfig.FromDefaultMicrophoneInput())
    //using (var audioConfig = AudioConfig.FromMicrophoneInput(audio))
    using (var recognizer = new SpeechRecognizer(speechConfig, audioConfig))
    {
        if(audioConfig == null)
        {
            Debug.Log("Audioconfig null");
        }
        recognizer.Recognizing += (s, e) =>
        {
            Debug.Log(e.Result.Text);
        };

        recognizer.Recognized += (s, e) =>
        {
            Debug.Log("recognized");
            if (e.Result.Reason == ResultReason.RecognizedSpeech)
            {
                //LuisManager instance = new LuisManager();
                StartCoroutine(LuisManager.instance.CalculateCommand(e.Result.Text));
                Debug.Log(e.Result.Text);
            }
            else if (e.Result.Reason == ResultReason.NoMatch)
            {
                Console.WriteLine($"NOMATCH: Speech could not be recognized.");
            }
        };

        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?");
            }

            stopRecognition.TrySetResult(0);
        };

        recognizer.SessionStarted += (s, e) => {
            Debug.Log("\n    Session started event.");
        };

        recognizer.SessionStopped += (s, e) =>
        {
            Debug.Log("\n    Session stopped event.");
            stopRecognition.TrySetResult(0);
        };

        await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);

        // Waits for completion. Use Task.WaitAny to keep the task rooted.
        Task.WaitAny(new[] { stopRecognition.Task });

        await recognizer.StopContinuousRecognitionAsync().ConfigureAwait(false);
    }


}

}

Thanks for your help!
best regards

Patrick