recording internal audio

[paralogicdr]

I want to record internal audio in processing. I have modified and tried one of the examples. My code is as follows. Should I add something in setup?

/**

• This sketch demonstrates how to use an AudioRecorder to record audio to disk.
• Press 'r' to toggle recording on and off and the press 's' to save to disk.
• The recorded file will be placed in the sketch folder of the sketch.
• For more information about Minim and additional features,
• visit http://code.compartmental.net/minim/
  */

import ddf.minim.;
import ddf.minim.ugens.;

Minim minim;
AudioOutput out;
AudioRecorder recorder;

void setup()
{
size(512, 200, P3D);

minim = new Minim(this);

out = minim.getLineOut();

// create a recorder that will record from the output to the filename specified
// the file will be located in the sketch's root folder.
recorder = minim.createRecorder(out, "myrecording.wav");

textFont(createFont("Arial", 12));
}

void draw()
{
background(0);
stroke(255);
// draw the waveforms
// the values returned by left.get() and right.get() will be between -1 and 1,
// so we need to scale them up to see the waveform
for(int i = 0; i < out.bufferSize() - 1; i++)
{
line(i, 50 + out.left.get(i)*50, i+1, 50 + out.left.get(i+1)*50);
line(i, 150 + out.right.get(i)*50, i+1, 150 + out.right.get(i+1)*50);
}

if ( recorder.isRecording() )
{
text("Currently recording...", 5, 15);
}
else
{
text("Not recording.", 5, 15);
}
}

void keyReleased()
{
if ( key == 'r' )
{
// to indicate that you want to start or stop capturing audio data, you must call
// beginRecord() and endRecord() on the AudioRecorder object. You can start and stop
// as many times as you like, the audio data will be appended to the end of the buffer
// (in the case of buffered recording) or to the end of the file (in the case of streamed recording).
if ( recorder.isRecording() )
{
recorder.endRecord();
}
else
{
recorder.beginRecord();
}
}
if ( key == 's' )
{
// we've filled the file out buffer,
// now write it to the file we specified in createRecorder
// in the case of buffered recording, if the buffer is large,
// this will appear to freeze the sketch for sometime
// in the case of streamed recording,
// it will not freeze as the data is already in the file and all that is being done
// is closing the file.
// the method returns the recorded audio as an AudioRecording,
// see the example AudioRecorder >> RecordAndPlayback for more about that
recorder.save();
println("Done saving.");
}
}

[ddf]

I'm not sure what you mean by "internal audio." The sketch you've shared here doesn't have anything sending sound to the AudioOutput so the AudioRecorder will record silence. How are you expecting this to work?