New Minim for 2.0

java/libraries/minim/examples/frequencyModulation/frequencyModulation.pde

@@ -0,0 +1,76 @@
+/* frequencyModulation
+<p>
+  A simple example for doing FM (frequency modulation) using two Oscils. 
+  Use the mouse to control the speed and range of the frequency modulation.
+<p>  
+  Author: Damien Di Fede
+*/
+
+// import everything necessary to make sound.
+import ddf.minim.*;
+import ddf.minim.ugens.*;
+
+// create all of the variables that will need to be accessed in
+// more than one methods (setup(), draw(), stop()).
+Minim minim;
+AudioOutput out;
+
+// the Oscil we use for modulating frequency.
+Oscil fm;
+
+// setup is run once at the beginning
+void setup()
+{
+  // initialize the drawing window
+  size( 512, 200, P3D );
+
+  // initialize the minim and out objects
+  minim = new Minim( this );
+  out   = minim.getLineOut();
+  
+  // make the Oscil we will hear.
+  // arguments are frequency, amplitude, and waveform
+  Oscil wave = new Oscil( 200, 0.8, Waves.TRIANGLE );
+  // make the Oscil we will use to modulate the frequency of wave.
+  // the frequency of this Oscil will determine how quickly the
+  // frequency of wave changes and the amplitude determines how much.
+  // since we are using the output of fm directly to set the frequency 
+  // of wave, you can think of the amplitude as being expressed in Hz.
+  fm   = new Oscil( 10, 2, Waves.SINE );
+  // set the offset of fm so that it generates values centered around 200 Hz
+  fm.offset.setLastValue( 200 );
+  // patch it to the frequency of wave so it controls it
+  fm.patch( wave.frequency );
+  // and patch wave to the output
+  wave.patch( out );
+}
+
+// draw is run many times
+void draw()
+{
+  // erase the window to black
+  background( 0 );
+  // draw using a white stroke
+  stroke( 255 );
+  // draw the waveforms
+  for( int i = 0; i < out.bufferSize() - 1; i++ )
+  {
+    // find the x position of each buffer value
+    float x1  =  map( i, 0, out.bufferSize(), 0, width );
+    float x2  =  map( i+1, 0, out.bufferSize(), 0, width );
+    // draw a line from one buffer position to the next for both channels
+    line( x1, 50 + out.left.get(i)*50, x2, 50 + out.left.get(i+1)*50);
+    line( x1, 150 + out.right.get(i)*50, x2, 150 + out.right.get(i+1)*50);
+  }  
+}
+
+// we can change the parameters of the frequency modulation Oscil
+// in real-time using the mouse.
+void mouseMoved()
+{
+  float modulateAmount = map( mouseY, 0, height, 220, 1 );
+  float modulateFrequency = map( mouseX, 0, width, 0.1, 100 );
+  
+  fm.frequency.setLastValue( modulateFrequency );
+  fm.amplitude.setLastValue( modulateAmount );
+}