Examples |
/* ADSRExample<br/>
is an example of using the ADSR envelope within an instrument.
<p>
For more information about Minim and additional features,
visit http://code.compartmental.net/minim/
<p>
author: Anderson Mills<br/>
Anderson Mills's work was supported by numediart (www.numediart.org)
*/
// 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 througout the class
Oscil sineOsc;
ADSR adsr;
// constructor for this instrument
ToneInstrument( float frequency, float amplitude )
{
// create new instances of any UGen objects as necessary
sineOsc = new Oscil( frequency, amplitude, Waves.TRIANGLE );
adsr = new ADSR( 0.5, 0.01, 0.05, 0.5, 0.5 );
// patch everything together up to the final output
sineOsc.patch( adsr );
}
// every instrument must have a noteOn( float ) method
void noteOn( float dur )
{
// turn on the ADSR
adsr.noteOn();
// patch to the output
adsr.patch( out );
}
// every instrument must have a noteOff() method
void noteOff()
{
// tell the ADSR to unpatch after the release is finished
adsr.unpatchAfterRelease( out );
// call the noteOff
adsr.noteOff();
}
}
// 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, 2048 );
// pause time when adding a bunch of notes at once
out.pauseNotes();
// make four repetitions of the same pattern
for( int i = 0; i < 4; i++ )
{
// add some low notes
out.playNote( 1.25 + i*2.0, 0.3, new ToneInstrument( 75, 0.49 ) );
out.playNote( 2.50 + i*2.0, 0.3, new ToneInstrument( 75, 0.49 ) );
// add some middle notes
out.playNote( 1.75 + i*2.0, 0.3, new ToneInstrument( 175, 0.4 ) );
out.playNote( 2.75 + i*2.0, 0.3, new ToneInstrument( 175, 0.4 ) );
// add some high notes
out.playNote( 1.25 + i*2.0, 0.3, new ToneInstrument( 3750, 0.07 ) );
out.playNote( 1.5 + i*2.0, 0.3, new ToneInstrument( 1750, 0.02 ) );
out.playNote( 1.75 + i*2.0, 0.3, new ToneInstrument( 3750, 0.07 ) );
out.playNote( 2.0 + i*2.0, 0.3, new ToneInstrument( 1750, 0.02 ) );
out.playNote( 2.25 + i*2.0, 0.3, new ToneInstrument( 3750, 0.07 ) );
out.playNote( 2.5 + i*2.0, 0.3, new ToneInstrument( 5550, 0.09 ) );
out.playNote( 2.75 + i*2.0, 0.3, new ToneInstrument( 3750, 0.07 ) );
}
// 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);
}
}
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Constructors |
ADSR();
ADSR(maxAmp);
ADSR(maxAmp, attTime);
ADSR(maxAmp, attTime, decTime);
ADSR(maxAmp, attTime, decTime, susLvl);
ADSR(maxAmp, attTime, decTime, susLvl, relTime);
ADSR(maxAmp, attTime, decTime, susLvl, relTime, befAmp);
ADSR(maxAmp, attTime, decTime, susLvl, relTime, befAmp, aftAmp);
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