Using Speechlib from SAPI (Microsoft text to speech API) as an AudioSource

Im building an app wich has a chatbot and uses SAPI for text to speech along with SALSA asset for lypsync. What i'm trying to acomplish is to create a live AudioSource that feeds directly from TTS audio output. I have succesfully acomplished this thru saving into wav files for each sentence and then loading the wav files in runtime to the gameobject that has the lypsync etc. This works, but the continious loading of wav files makes the app be slow, freeze each time it does that and even crash.

I know it's possible to make a live audiosource from a microphone on the computer. So what I want to do is something like that.

I tried what from my naive level of programmer would be the logic way. Simply connect the audiooutput stream from the TTS as a audisource audio clip, like this:

TTSvoice.AudioOutputStream = AudioSource.clip; and get this error:

error CS0029: Cannot implicitly convert type UnityEngine.AudioClip' to SpeechLib.ISpeechBaseStream'`SpeechLib.ISpeechBaseStream'

I know in Python you can connect audio objects from different libraries thru numpy converting audio to a standard raw array data. But I'm also kinda new to C# and Unity.

here's my code:

 using UnityEngine;
 
 using System.Collections;
 using SpeechLib;
 using System.Xml;
 using System.IO;
 using System;
 using System.Diagnostics;
 
 public class controller : MonoBehaviour {
 
     private SpVoice voice;
     public AudioSource soundvoice;
 
     // Use this for initialization
     void Start () {
 
         voice = new SpVoice();
 
         GameObject character = GameObject.Find("character");
         soundvoice = character.GetComponent(typeof(AudioSource)) as AudioSource;
 
         voice.AudioOutputStream = soundvoice.clip;
       
         StartCoroutine(talksome());
     }
     
     // Update is called once per frame
     void Update () {
 
         
 
     }
 
     IEnumerator talksome() {
         while (true)
         {
             counter++;
             string sentence = "counting " + counter;
             voice.Speak(sentence);
             print(sentence);
 
             voice.WaitUntilDone(1);
             yield return new WaitForSeconds(2);
         }
     }
 }