How to increase sive wave with keypress rather than moving the mouse

Processing Libraries
1

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

Minim minim;
AudioOutput out;
Oscil wave;

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

minim = new Minim(this);

// use the getLineOut method of the Minim object to get an AudioOutput object
out = minim.getLineOut();

// create a sine wave Oscil, set to 440 Hz, at 0.5 amplitude
wave = new Oscil( 440, 0.5f, Waves.SINE );
// patch the Oscil to the output
wave.patch( out );
}

void draw()
{
background(0);
stroke(255);
strokeWeight(1);

// draw the waveform of the output
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 );
}

// draw the waveform we are using in the oscillator
stroke( 128, 0, 0 );
strokeWeight(4);
for( int i = 0; i < width-1; ++i )
{
point( i, height/2 - (height*0.49) * wave.getWaveform().value( (float)i / width ) );
}
}

void mouseMoved()
{
// usually when setting the amplitude and frequency of an Oscil
// you will want to patch something to the amplitude and frequency inputs
// but this is a quick and easy way to turn the screen into
// an x-y control for them.

float amp = map( mouseY, 0, height, 1, 0 );
wave.setAmplitude( amp );

float freq = map( mouseX, 0, width, 110, 880 );
wave.setFrequency( freq );
}

void keyPressed()
{
switch( key )
{
case ‘1’:
wave.setWaveform( Waves.SINE );
break;

case '2':
  wave.setWaveform( Waves.TRIANGLE );
  break;

case '3':
  wave.setWaveform( Waves.SAW );
  break;

case '4':
  wave.setWaveform( Waves.SQUARE );
  break;

case '5':
  wave.setWaveform( Waves.QUARTERPULSE );
  break;

default: break;

}
}

2

Please post in the right cathegory.

3

you already have the code for keypressed and switch,
you want add more keys there? changing amp and freq instead with mouse position?


float amp=0.5;
float freq=440;


void draw() {
  //  amp = map( mouseY, 0, height, 1, 0 );
  //  freq = map( mouseX, 0, width, 110, 880 );

  println(" amp "+nf(amp, 1, 2)+" freq "+nf(freq, 1, 1));
}


void keyPressed()
{
  switch( key )
  {
  case '1':
    //
    break;
    //...
    // add
  case 'A':
    amp += 0.01;
    break;
  case 'a':
    amp -= 0.01;
    break;
  case 'F':
    freq += 10;
    break;
  case 'f':
    freq -= 10;
    break;


  default: 
    break;
  }
}

but actually i just play with a other “primitiv (NoGUI) slider” concept
what is promising.

use the mouse wheel for SLIDING and keypressed to assign different jobs to it


float amp=0.5;
float freq=440;

void setup(){
 println("use key [a] amp or [f] freq plus mouse wheel "); 
}

void draw() {
  //  amp = map( mouseY, 0, height, 1, 0 );
  //  freq = map( mouseX, 0, width, 110, 880 );

  println(" amp "+nf(amp, 1, 2)+" freq "+nf(freq, 1, 1));
}

/*
void keyPressed()
{
  switch( key )
  {
  case '1':
    //
    break;
    //...
    // add
  case 'A':
    amp += 0.01;
    break;
  case 'a':
    amp -= 0.01;
    break;
  case 'F':
    freq += 10;
    break;
  case 'f':
    freq -= 10;
    break;


  default: 
    break;
  }
}

*/

void mouseWheel(MouseEvent event) {
  if (keyPressed) {
    if (key == 'a') {
      amp += event.getCount()/100.0; 
      amp = constrain(amp,0,1);
    } else
    if (key == 'f') {
      freq += event.getCount()*10.0; 
      freq = constrain(freq,110,880);
    } 
  } else {  // no key pressed
// default slider
  }

}
1 Like
4

I don’t know, i think he had the concept and just wanted to post it, but that should go in the Gallery cathegory… at least thats what i thought…

5

so i miss-understand the TITLE?

How to increase sive wave with keypress rather than moving the mouse

6

Yeah, maybe… it’s not explained very well, but the sentence makes sense in both cases, question and explanation. For example, Question : “How to get good at math?” Or Tutorial : “How to get good at Math”
Same sentence, just without question mark, and if i’m not wrong, then he already got a method for mouse input… but there i might be wrong…

I mean this part.

void mouseMoved()
{
// usually when setting the amplitude and frequency of an Oscil
// you will want to patch something to the amplitude and frequency inputs
// but this is a quick and easy way to turn the screen into
// an x-y control for them.

float amp = map( mouseY, 0, height, 1, 0 );
wave.setAmplitude( amp );

float freq = map( mouseX, 0, width, 110, 880 );
wave.setFrequency( freq );
}
7

exactly
should sound terrible,
like my mouse X Y “THEREMIN” https://en.wikipedia.org/wiki/Theremin
( unless that operation concept is wanted )

already a mouseDragged ( mouse pressed and moved ) instead
might have helped not to have constant changing settings