I can't find a working way to capture the microphone input volume (2019.1)

Unity Engine
,
1

Greetings,
I’ve been looking for 1 hour on how to get the mic input volume but every single solution I found does not work for some reason.
The most popular script by far is this one :

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MicInput : MonoBehaviour {
        public static float MicLoudness;
        private string _device;
        //mic initialization
        void InitMic(){
            if(_device == null) _device = Microphone.devices[0];
            _clipRecord = Microphone.Start(_device, true, 999, 44100);
        }
        void StopMicrophone()
        {
            Microphone.End(_device);
        }
        AudioClip _clipRecord = new AudioClip();
        int _sampleWindow = 128;
        //get data from microphone into audioclip
        float  LevelMax()
        {
            float levelMax = 0;
            float[] waveData = new float[_sampleWindow];
            int micPosition = Microphone.GetPosition(null)-(_sampleWindow+1); // null means the first microphone
            if (micPosition < 0) return 0;
            _clipRecord.GetData(waveData, micPosition);
            // Getting a peak on the last 128 samples
            for (int i = 0; i < _sampleWindow; i++) {
                float wavePeak = waveData[i] * waveData[i];
                if (levelMax < wavePeak) {
                    levelMax = wavePeak;
                }
            }
            return levelMax;
        }
        void Update()
        {
            // levelMax equals to the highest normalized value power 2, a small number because < 1
            // pass the value to a static var so we can access it from anywhere
            MicLoudness = LevelMax ();
        }
        bool _isInitialized;
        // start mic when scene starts
        void OnEnable()
        {
            InitMic();
            _isInitialized=true;
        }
        //stop mic when loading a new level or quit application
        void OnDisable()
        {
            StopMicrophone();
        }
        void OnDestroy()
        {
            StopMicrophone();
        }
        // make sure the mic gets started & stopped when application gets focused
        void OnApplicationFocus(bool focus) {
            if (focus)
            {
                Debug.Log("Focus");
                if(!_isInitialized){
                    Debug.Log("Init Mic");
                    InitMic();
                    _isInitialized=true;
                }
            }   
            if (!focus)
            {
                Debug.Log("Pause");
                StopMicrophone();
                Debug.Log("Stop Mic");
                _isInitialized=false;
            }
        }
    }

But as soon as I paste it, I get an error on the line 16 because there are no AudioClip constructor that doesn’t take arguments.
I have tried to simply remove the “= new AudioClip()” part and the Microphone.MicLoudness is just gibberish, it absolutely doesn’t reflect my microphone volume, and yes I am sure I’m using the right microphone, it’s the default one. I don’t even know if it’s because of the AudioClip() error. Is this related to 2019.1 ?

Thank you in advance for any help, it’s becoming frustrating to take this long for what seems to be an absolutely trivial need.

2

Ok so it appears that the problem comes from the fact that I’m using Google Cloud Speech recognition which gets in conflict with this script getting the microphone. I now have to find out how to get the mic volume inside this mess…

Also, without GCSpeechRecognition it works fine when I simply remove the “= new AudioClip()” part.

1 Like