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# Non-Linear/Exponential Sound

edited January 2016 in Arduino

Hi,

How do I create non-linear/exponential sound with sinewave code. Below is the code I am currently working with. The frequency is very choppy.

Thanks

``````    import processing.serial.*;
import processing.sound.*;
import cc.arduino.*;

Arduino arduino;
SinOsc sine;

int total1;
//int total2;
//int total3;

float freq=400;
float amp=0.5;
float pos;

void setup() {
// window size
size(470, 280);
background(0);
// print out all the device connected to serial ports
println(Arduino.list());

arduino = new Arduino(this, Arduino.list(), 57600);

// Create and start the sine oscillator.
sine = new SinOsc(this);

//Start the Sine Oscillator.
sine.play();

}

void draw() {
fill(0,0,0,5);
rect(0,0,width,height);

// read capacitive sensor value sent via firmata

print("total1 : ");
print(total1);
println();

if (total1 >=40 && total1 <=1200){
// Map from 0.0 to 1.0 for amplitude
amp=map(total1, 40, 1200, 0.0, 1.0);
sine.amp(amp);
} else if (total1 <=40) {
amp = 0;
sine.amp(amp);
}
println(total1);

if (total1 >=40 && total1 <=1200){

// Map from 20Hz to 1000Hz for frequency
freq=map(total1, 40, 1200, 500.0, 1000.0);
sine.freq(freq);

}

// Map from -1.0 to 1.0 for left to right
pos=0.0;//map(mouseX, 0, width, -1.0, 1.0);
sine.pan(pos);

} // end draw
``````
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