Visualizing FFT values on a 3D object using microphone input from Android Device.

Answers

• kfrajer

  November 2016

  I am trying to get this effect to work on my Android phone

  The link shows a VR environment example but I don't see the reference to the FFT. What do you want to get from the FFT? What effect are you looking to implement? In other words, what minim functions were you thinking in using?

  Kf
• TimothyThomasson

  November 2016 edited November 2016

  ``I have the following code which changes the size of a sphere based on in.right.get(i+1)*50. I am trying to get something working like this on the Android device so I can implement it in VR. I can get the Sphere to display just fine, however I am just having trouble with the audio portion. I have been trying to follow this link but am having trouble. https://forum.processing.org/one/topic/microphone-on-android.html

  Thank you!

      import ddf.minim.*;
  
      Minim minim;
      AudioInput in;
  
      void setup()
      {
        size(1500, 1500, P3D);
  
        minim = new Minim(this);
  
        // use the getLineIn method of the Minim object to get an AudioInput
        in = minim.getLineIn();
      }
  
      void draw()
      {
        background(#FAE928);
        stroke(#393939);
        strokeWeight(2);
  
  
        for (int i = 0; i < in.bufferSize() - 1; i++)
        {
          noFill();
          pushMatrix();
          translate(width/2, height/2);
          rotateY(radians(frameCount));
          sphereDetail(6);
          sphere(300 + in.right.get(i+1)*50 );
          popMatrix();
  
• kfrajer

  November 2016

  Did you try the audioInput example from the Ketai library?

  http://ketai.org/examples/audioinput/

  Notice that as fas as I know, minim kibrary doesn't work in Android.

  Kf
• kfrajer

  November 2016

  I encourage you to work in java mode and using minim to create a demo of your effect using FFT. This will give you a better understanding how to implement your code in Android mode. In java mode you will have the advantage of your code being executed faster and debugging will be less painful.

  Kf
• akenaton

  November 2016 edited November 2016

  @ThimothyThomasson===

  --you cannot use minim with the android mode

  --in order to capture the mic you have to use the AudioRecord class from android:: see here for more details https://developer.android.com/reference/android/media/AudioRecord.html

  -- with this class you (normally) can save your input then read it

  -- but you can also read it without saving using a buffer and an audio track

  -- as for applying fft in real time to that best way (as for me) is to use the tarsosdsp lib