Minim |
|
phase |
Description Patch to this to control the phase of the oscillator with another UGen.Signature UGen.UGenInput phase Related OscilExample /* oscilPhaseExample<br/> is an example of controlling the phase of an Oscil UGen inside an Instrument. <p> For more information about Minim and additional features, visit http://code.compartmental.net/minim/ <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; // Every instrument must implement the Instrument interface so // playNote() can call the instrument's methods. class ToneInstrument implements Instrument { // create all variables that must be used throughout the class Oscil sineOsc; // we use the Line to control the phase of sineOsc Line sinePhase; // the phase we should sweep to over the duration of the note float phaseTarget; // constructors for this intsrument ToneInstrument( float frequency, float amplitude, float target ) { // create new instances of any UGen objects as necessary sineOsc = new Oscil( frequency, amplitude, Waves.SINE ); sinePhase = new Line(); phaseTarget = target; // connect the LFO to the phase of sineOsc sinePhase.patch( sineOsc.phase ); } // every instrument must have a noteOn( float ) method void noteOn( float dur ) { // reset sineOsc so we don't get a click when starting the note sineOsc.reset(); // sweep the sine's phase from 0 to 1 sinePhase.activate( dur, 0, phaseTarget ); // and patch to the output sineOsc.patch( out ); } // every instrument must have a noteOff() method void noteOff() { sineOsc.unpatch( out ); } } // we reuse this instrument to demonstrate // how you can resetPhase on an Oscil to // start notes at a zero crossing, // regardless of where it left off ToneInstrument sine440; // setup is run once at the beginning void setup() { // initialize the drawing window size( 512, 200, P2D ); // initialize the minim and out objects minim = new Minim( this ); out = minim.getLineOut( Minim.MONO, 1024 ); // initialize our steady tone. // we pass in 0 for the phase target // because we don't want the phase of this instrument to sweep sine440 = new ToneInstrument( 440.f, 0.25, 0 ); // pause time when adding a bunch of notes at once out.pauseNotes(); // we'll add four sets of two tones, // sweeping the phase of one of the tones each time // each time we sweep the phase of the second tone // to 0.5 over the duration of the note. // what ends up happening is that the second // tone cancels out the first as the phase becomes // exactly inverted, causing it to sound like // a single tone fading away to silence float noteTime = 0; for(int i = 0; i < 4; i++) { float toneDur = 2.0f + i; out.playNote( noteTime, toneDur, sine440 ); out.playNote( noteTime, toneDur, new ToneInstrument(440.f, 0.25f, 0.5f) ); noteTime += toneDur + 1.0f; } // resume time after a bunch of notes are added at once out.resumeNotes(); } // 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); } } Usage Web & Application |