Constructors

Construct a Multiplier with a fixed value of 1, which will mean incoming audio is not changed.
Multiplier()
Construct a Multiplier with a fixed value.
Multiplier(float value)

Parameters

Related

Example

/**
  This is an example of using a Multiplier UGen, which performs the very simple operation of 
  multiplying the incoming signal by the current value of its amplitude input.
  <p>
  Move the mouse left and right to change the value of the Multiplier. 
  All the way left is 0.1 and all the way right is 1.
  <p>
  For more information about Minim and additional features,<br/>
  visit http://code.compartmental.net/minim/
  <p>
  author: Damien Di Fede
*/

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

Minim         minim;
AudioOutput   out;
Oscil         osc;
Multiplier    multiplier;

void setup()
{
  // setup the size of the app
  size(640, 200);
  
  // create our Minim object for loading audio
  minim = new Minim(this);
  
  // get a line out from Minim. It's important that the file is the same audio format 
  // as our output (i.e. same sample rate, number of channels, etc).
  out = minim.getLineOut();
  
  osc = new Oscil( 440, 1 );
  multiplier = new Multiplier( 0.5f );
  
  // normally we wouldn't use a multiplier with an Oscil like this
  // because we could simply set the amplitude of the Oscil itself.
  osc.patch( multiplier ).patch( out );
                        
}

// draw is run many times
void draw()
{
  // map the mouse position to a new value for the multiplier
  float value = map(mouseX, 0, width, 0.1, 1);
  
  // set the new value.
  // this is equivalent to multiplier.amplitude.setLastValue( value )
  // you'll also notice this causes audible clicks if you move the mouse quickly
  // to keep that from happening, you will usually want to use a Line patched 
  // to the Multiplier's amplitude input.
  multiplier.setValue( value );
  
  // 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);
  }  
}

Usage