public class SomeConsumer : MonoBehaviour
{
    void floatsFromMic( float[] buf )
    {
        ...
    }

    Start()
    {
        MySingleton.Instance.theDelegate += new MySingleton.MicCallbackDelegate( floatsFromMic );
    }
}



using UnityEngine;
using System.Collections;

public class MySingleton : MonoBehaviour
{
    public delegate void MicCallbackDelegate( float[] buf );

    public MicCallbackDelegate theDelegate;

    void Start ()
    {

    }

    void Update ()
    {
        !!! gather floats

        for( ? d in theDelegate.things )
            FIRE d
    }

    public void DoSomething()
    {

    }

    private static MySingleton _instance;
    public static MySingleton Instance
    {
        get
        {
            if( _instance == null )
            {
                GameObject go = new GameObject( "MySingleton" );
                _instance = go.AddComponent< MySingleton >();
            }
            return ( _instance );
        }
    }
}