check current Microphone input volume

hi there!

i'm trying to use the player's voice to control ingame objects directly (without any delay). i have to check how loud the user shouts into his/her microphone. currently it looks like this:

Code (csharp):

1.  
2. //Script MicrophoneInput
3. void Start(){
4. if (device == null) device = Microphone.devices[0];
5. audio.clip = Microphone.Start(MicrophoneInput.device, true, 999, 44100);
6. while (!(Microphone.GetPosition(device) > 0))
7. {} audio.Play();
8. }
9. void Update(){
10.  
11.         if (!active) return;
12.         float[] data = new float[735];
13.         audio.GetOutputData(data, 0);
14. //take the median of the recorded samples
15.         ArrayList s = new ArrayList();
16.         foreach (float f in data)
17.         {
18.             s.Add(Mathf.Abs(f));
19.         }
20.         s.Sort();
21.         Volume = (float)s[735 / 2];
22. }
23.  

this works so far, but only if the audiosource of the object isn't muted. the problem is, i don't want the player to hear her-/himself

i would appreciate any suggestions!

 

Perhaps you could create an audio listener way outside the map and have it play on that one and determine the volume there, instead?

There's probably a better way, but that would seem to work, if nothing else.

 

ya that seems to work at first. problem is, that the audioclip created by the Microphone.Start-method is a 2D-Clip, so it doesn't matter where i play it, it's always the same volume

 

I believe that the 3d aspect is in the audio source. I dont believe any clip is 3d initially, it is all in how you use it.

 

well, as far as i know are audiosources capable of both, 2d and 3d sound. if i import some audioclips, i can choose if they are used 2d or 3d within the optionbox, but not via a script. at least i couldn't find the fitting methods. so i can't change that the clip that's produced by the Microphone-class is 2d, not 3d.

 

It's been one year there is no activity on this thread, but Google brings me there.
For the ones looking for a solution, I have one;

Code (csharp):

1. int dec = 128;
2. float[] waveData = new float[dec];
3. int micPosition = Microphone.GetPosition(null)-(dec+1); // null means the first microphone
4. clipRecord.GetData(waveData, micPosition);
5.  
6. // Getting a peak on the last 128 samples
7. float levelMax = 0;
8. for (int i = 0; i < dec; i++) {
9.     float wavePeak = waveData[i] * waveData[i];
10.     if (levelMax < wavePeak) {
11.         levelMax = wavePeak;
12.     }
13. }
14. // levelMax equals to the highest normalized value power 2, a small number because < 1
15. // use it like:
16. UIGauge.level = Mathf.Sqrt(levelMax);
17.  

We just read the current recording audioclip, at the current recording position of the microphone

 

Hi,

@crazyrems

just to step in cause I implement your code. You need to check that micposition is not a negative value else, GetData will fire "result == FMOD_OK" and it doesn't fire an exception so that error is fatal in all cases.

so don't sample if micPosition<0


bye,

Jean

 

Here is a complete script implementing the solution from above,
as well as making sure that the app doesn't crash when it gets focused/unfocused on a mobile device, or the next level gets loaded.

To access the Value from anywhere just do:

Code (CSharp):

1. MicInput.MicLoudness;

Code (CSharp):

1. public class MicInput : MonoBehaviour {
2.      
3.         public static float MicLoudness;
4.  
5.         private string _device;
6.      
7.         //mic initialization
8.         void InitMic(){
9.             if(_device == null) _device = Microphone.devices[0];
10.             _clipRecord = Microphone.Start(_device, true, 999, 44100);
11.         }
12.      
13.         void StopMicrophone()
14.         {
15.             Microphone.End(_device);
16.         }
17.      
18.  
19.         AudioClip _clipRecord = new AudioClip();
20.         int _sampleWindow = 128;
21.      
22.         //get data from microphone into audioclip
23.         float  LevelMax()
24.         {
25.             float levelMax = 0;
26.             float[] waveData = new float[_sampleWindow];
27.             int micPosition = Microphone.GetPosition(null)-(_sampleWindow+1); // null means the first microphone
28.             if (micPosition < 0) return 0;
29.             _clipRecord.GetData(waveData, micPosition);
30.             // Getting a peak on the last 128 samples
31.             for (int i = 0; i < _sampleWindow; i++) {
32.                 float wavePeak = waveData[i] * waveData[i];
33.                 if (levelMax < wavePeak) {
34.                     levelMax = wavePeak;
35.                 }
36.             }
37.             return levelMax;
38.         }
39.      
40.      
41.      
42.         void Update()
43.         {
44.             // levelMax equals to the highest normalized value power 2, a small number because < 1
45.             // pass the value to a static var so we can access it from anywhere
46.             MicLoudness = LevelMax ();
47.         }
48.      
49.         bool _isInitialized;
50.         // start mic when scene starts
51.         void OnEnable()
52.         {
53.             InitMic();
54.             _isInitialized=true;
55.         }
56.      
57.         //stop mic when loading a new level or quit application
58.         void OnDisable()
59.         {
60.             StopMicrophone();
61.         }
62.      
63.         void OnDestroy()
64.         {
65.             StopMicrophone();
66.         }
67.      
68.      
69.         // make sure the mic gets started & stopped when application gets focused
70.         void OnApplicationFocus(bool focus) {
71.             if (focus)
72.             {
73.                 //Debug.Log("Focus");
74.              
75.                 if(!_isInitialized){
76.                     //Debug.Log("Init Mic");
77.                     InitMic();
78.                     _isInitialized=true;
79.                 }
80.             }      
81.             if (!focus)
82.             {
83.                 //Debug.Log("Pause");
84.                 StopMicrophone();
85.                 //Debug.Log("Stop Mic");
86.                 _isInitialized=false;
87.              
88.             }
89.         }
90.     }
91.  

 

Thank you man! This is one of the simplest and working scripts for Mic input out there!

 

Thanks to your answer. If I want to display the realtime volume in decibel, how to calculate by "wavedata". I mean I can not understand these numbers of MicLoudness.

---------------------------------------------------------------------------------------------------

I have made it now! Thanks!

 

how you have solved it?

 

Hi, i have try your script but it seems that the MicLoudNess no different between silent and noisy...

or any idea to convert to desible unit ?

any idea ?[/QUOTE]

 

Hi!
I've been using this script and it works great. Does anyone know how to adjust the microphone sensitivity? Not sure how it works.

Thanks!

 

Info/Explaination

Hi!

Okay, now to end this threat once and for all. READ CLOSELY(for people like me)

The values MicLoudness returns, is a float linear to get it in decibels you need to do this

Code (CSharp):

1. float db = 20 * Mathf.Log10(Mathf.Abs(MicInput.MicLoudness));

And there you have it Your volume in decibels

If you want to get decibels or float linear of a recorded/audio clip

First do not init the mic and in one of your scripts in start method call MicInput.StopMicrophone

Then use the same code but just change the _cliprecord with your audio clip and instead of 128 use the length of the samples i.e

Code (CSharp):

1. AudioClip clip = myRecordedOrOwnClip;
2.  
3. _sampleWindow = clip.samples;

If you have any problems let me know

Full Script

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class MicInput : MonoBehaviour
6. {
7.     #region SingleTon
8.  
9.     public static MicInput Inctance { set; get; }
10.  
11.     #endregion
12.  
13.     public static float MicLoudness;
14.     public static float MicLoudnessinDecibels;
15.  
16.     private string _device;
17.  
18.     //mic initialization
19.     public void InitMic()
20.     {
21.         if (_device == null)
22.         {
23.             _device = Microphone.devices[0];
24.         }
25.         _clipRecord = Microphone.Start(_device, true, 999, 44100);
26.         _isInitialized = true;
27.     }
28.  
29.     public void StopMicrophone()
30.     {
31.         Microphone.End(_device);
32.         _isInitialized = false;
33.     }
34.  
35.  
36.     AudioClip _clipRecord = new AudioClip();
37.     AudioClip _recordedClip = new AudioClip();
38.     int _sampleWindow = 128;
39.  
40.     //get data from microphone into audioclip
41.     float MicrophoneLevelMax()
42.     {
43.         float levelMax = 0;
44.         float[] waveData = new float[_sampleWindow];
45.         int micPosition = Microphone.GetPosition(null) - (_sampleWindow + 1); // null means the first microphone
46.         if (micPosition < 0) return 0;
47.         _clipRecord.GetData(waveData, micPosition);
48.         // Getting a peak on the last 128 samples
49.         for (int i = 0; i < _sampleWindow; i++)
50.         {
51.             float wavePeak = waveData[i] * waveData[i];
52.             if (levelMax < wavePeak)
53.             {
54.                 levelMax = wavePeak;
55.             }
56.         }
57.         return levelMax;
58.     }
59.  
60.     //get data from microphone into audioclip
61.     float MicrophoneLevelMaxDecibels()
62.     {
63.  
64.         float db = 20 * Mathf.Log10(Mathf.Abs(MicLoudness));
65.  
66.         return db;
67.     }
68.  
69.     public float FloatLinearOfClip(AudioClip clip)
70.     {
71.         StopMicrophone();
72.  
73.         _recordedClip = clip;
74.  
75.         float levelMax = 0;
76.         float[] waveData = new float[_recordedClip.samples];
77.  
78.         _recordedClip.GetData(waveData, 0);
79.         // Getting a peak on the last 128 samples
80.         for (int i = 0; i < _recordedClip.samples; i++)
81.         {
82.             float wavePeak = waveData[i] * waveData[i];
83.             if (levelMax < wavePeak)
84.             {
85.                 levelMax = wavePeak;
86.             }
87.         }
88.         return levelMax;
89.     }
90.  
91.     public float DecibelsOfClip(AudioClip clip)
92.     {
93.         StopMicrophone();
94.  
95.         _recordedClip = clip;
96.  
97.         float levelMax = 0;
98.         float[] waveData = new float[_recordedClip.samples];
99.  
100.         _recordedClip.GetData(waveData, 0);
101.         // Getting a peak on the last 128 samples
102.         for (int i = 0; i < _recordedClip.samples; i++)
103.         {
104.             float wavePeak = waveData[i] * waveData[i];
105.             if (levelMax < wavePeak)
106.             {
107.                 levelMax = wavePeak;
108.             }
109.         }
110.  
111.         float db = 20 * Mathf.Log10(Mathf.Abs(levelMax));
112.  
113.         return db;
114.     }
115.  
116.  
117.  
118.     void Update()
119.     {
120.         // levelMax equals to the highest normalized value power 2, a small number because < 1
121.         // pass the value to a static var so we can access it from anywhere
122.         MicLoudness = MicrophoneLevelMax();
123.         MicLoudnessinDecibels = MicrophoneLevelMaxDecibels();
124.     }
125.  
126.     bool _isInitialized;
127.     // start mic when scene starts
128.     void OnEnable()
129.     {
130.         InitMic();
131.         _isInitialized = true;
132.         Inctance = this;
133.     }
134.  
135.     //stop mic when loading a new level or quit application
136.     void OnDisable()
137.     {
138.         StopMicrophone();
139.     }
140.  
141.     void OnDestroy()
142.     {
143.         StopMicrophone();
144.     }
145.  
146.  
147.     // make sure the mic gets started & stopped when application gets focused
148.     void OnApplicationFocus(bool focus)
149.     {
150.         if (focus)
151.         {
152.             //Debug.Log("Focus");
153.  
154.             if (!_isInitialized)
155.             {
156.                 //Debug.Log("Init Mic");
157.                 InitMic();
158.             }
159.         }
160.         if (!focus)
161.         {
162.             //Debug.Log("Pause");
163.             StopMicrophone();
164.             //Debug.Log("Stop Mic");
165.  
166.         }
167.     }
168. }
169.  
170.  

Thanks!

 

After I updated to Unity 2018.1, I got such error:
NullReferenceException: Object reference not set to an instance of an object
MicInput.LevelMax () (at Assets/MicInput.cs:33)
MicInput.Update () (at Assets/MicInput.cs:50)

which line 33 is:

Code (CSharp):

1.         _clipRecord.GetData(waveData, micPosition);

and line 50 is:

Code (CSharp):

1.         MicLoudness = LevelMax ();

Does anyone knows how to fix it?

 

error

MicInput.cs(26,26): Error CS0143: El tipo 'UnityEngine.AudioClip' no tiene constructores definidos (CS0143) (Assembly-CSharp)
MicInput.cs(28,28): Error CS0143: El tipo 'UnityEngine.AudioClip' no tiene constructores definidos (CS0143) (Assembly-CSharp)

 

Here is the line 19 : AudioClip _clipRecord = new AudioClip();
On line 19 it gives an error and says: "AudioClip " does not take a constructor that takes 0 arguments.

How to fix it?

Here is the line 19 : AudioClip _clipRecord = new AudioClip();
On line 19 it gives an error and says: "AudioClip " does not take a constructor that takes 0 arguments.

How to fix it?

 

Just remove

Code (CSharp):

1. = new AudioClip()

The microphone class is creating the audioclip anyway, so it's redundant.

 

Hey guys, can i increase input decibels then output it?

 

Hello! My output decibels are between -160db (quiet) to 0db (close to screaming). Does someone know why?
(They should be posetive, right?)

I copied the "full script" posted by A_munim with just one modification. I removed = new AudioClip(). To fix thoose errors as lilshaque mentioned.

(Unity 2018.3.3f1)

 

I'm getting a constant -infinty on my MicLoudnessinDecibels.

I checked to make sure the mic was detected and it was.

EDIT: okay so I didn't have an audio source lol, once I added that I was able to get some db data, however I'm having the same issue as Mogge858 where 0 is the highest number.

ARG EDIT: Right so 0 db is unity gain. Data checks out. Anything above would mean that the data is being amplified. And I call myself an audio engineer...

 

Hi guys. I'm really sorry to awake a dead post but i'm stuck. I've tried everything and i can't find the issue. I CAN'T get consistent results for my volume. Sometimes a whisper gives me a higher result than a shout and vice versa. Please can anybody help me?!

Code (CSharp):

1. private void Update()
2.     {
3.         micInputVolume = LevelMax();
4.     }
5.  
6.  
7.  
8.     float LevelMax()
9.     {
10.         int _sampleWindow = 128;
11.         float levelMax = 0;
12.         float[] waveData = new float[_sampleWindow];
13.         int micPosition = Microphone.GetPosition(null) - (_sampleWindow + 1); // null means the first microphone
14.         if (micPosition < 0) return 0;
15.         microphoneInput.GetData(waveData, micPosition);
16.  
17.         // Getting a peak on the last 128 samples
18.         for (int i = 0; i < _sampleWindow; i++)
19.         {
20.             float wavePeak = waveData[i] * waveData[i];
21.             if (levelMax < wavePeak)
22.             {
23.                 levelMax = wavePeak;
24.             }
25.         }
26.         return levelMax;
27.     }

 

Is it possibly to do with the fact that in decibels a whisper can often be louder that a raised voice. Not sure it it's true but I read somewhere a babys scream is intended for high decibel range to get attention. Also a whisper can sometimes be louder than a seargent major whaling at his platoon. It might not carry RANGE but in decibels a whisper is greater. Correct me if this is wrong. Cheers

 

Can someone kindly explain how to get the audio playback from this mic input script. I know there might be delay but that might be to my advantage as Im using the script to action lipsync on a character using blendshapes based on volume levels. Reason I want the audio playback is to change the pitch to a cartoon voice. The delay in playback will likely sync up with the small delay in mouth actions from the volume inputs. Many Thanks!

 

Just stumbled in here, but loudness is a very complicated thing because it's time and delta based. I think what you want is to calculate the RMS of the audio then convert that to dbs. Specify a period (length)

Code (CSharp):

1.    public static float ComputeRMS( float[] buffer, int offset, ref int length )
2.     {
3.         // sum of squares
4.         float sos = 0f;
5.         float val;
6.         if( offset + length > buffer.Length )
7.         {
8.             length = buffer.Length - offset;
9.         }
10.         for( int i = 0; i < length; i++ )
11.         {
12.             val = buffer[ offset ];
13.             sos += val * val;
14.             offset ++;
15.         }
16.         // return sqrt of average
17.         return Mathf.Sqrt( sos / length );
18.     }
19.     public static float ComputeDB( float[] buffer, int offset, ref int length )
20.     {
21.         float rms;
22.         rms = ComputeRMS( buffer, offset, ref length );
23.         // could divide rms by reference power, simplified version here with ref power of 1f.
24.         // will return negative values: 0db is the maximum.
25.         return 10 * Mathf.Log10( rms );
26.     }

 

in light of the example further up which has `_sampleWindow` - what would `offset` and `length` be here @nykwil ?

 

The rms is calculated against a certain chunk of time. length is the number of samples and offset is the time into the buffer that it starts calculating it.

 

I followed the same step as mentioned by @Mogge858, but was still getting a constant -infinity for MicLoudnessinDecibels. I also tried adding an audio source to the GameManager with the script as mentioned by @AmarBagh; however, the MicLoudnessinDecibels remained as -infinity. Does anyone know how to resolve this problem? For example, do I need to change anything in the code or tune the properties of audio source? Thanks!

 

also having the same problem as awinder

 

As @nykwil noted above, you want to use RMS and then convert to dBs. This old post has a great explanation and the code still works. It even lets you tweak the level so that you can get dBs that make sense (i.e., a whisper at around 20). https://answers.unity.com/questions...esent-t.html?childToView=158800#answer-158800

 

@awinder i am facing the same issue too if you have found out the solution can you share it

 

i am facing a issue where my MicLoudnessinDecibels reamins - infinity

 

yeah thanks guys! I'm almost there.
@nykwil Yes the RMS would make a lot of sense. But I don't know how to call the two methods:
ComputeRMS(...) and ComputeDB(...)
and what to put into the first two arguments?

 

To kind of RMS I helped myself with MathF.smoothdamp.

 

I get this error from the microphone on the .GetData() line

./Modules/Audio/Public/sound/SoundManager.cpp(716) : Error executing result = instance->m_Sound->lock(offsetBytes, lengthBytes, &ptr1, &ptr2, &len1, &len2) (An invalid parameter was passed to this function. )
UnityEngine.AudioClip:GetData (single[],int)