Using professor’s code, I only changed the output function. I defined new amplitude, 

which I assigned 2 times the original amplitude. I also defined a frequency, 

which I also assigned 2 times the original frequency. I took this new function 

and added it to the original function. Although the results were different from 

the original function, I do not know what these results mean. I hope to gain some 

insight to it in class today, and improve my understanding of the results.

Below is the modified Professor’s code:

/********************************************************/

/*

 *  printwave.c

 *  WaveAsText

 *

 *  Created by Christopher Dobrian on Wed Jan 14 2004.

 *  Modified by Faisal Bihi on Wed Jan 21 2004

 *

 */

#include <stdio.h>

#include <math.h>

#define NUM_SECONDS	(1.)

#define SAMPLE_RATE     (44100.)

#define TWOPI          	(6.283185307179586)

#define MAXAMP          (1.)

#define FREQUENCY       (1000.)

int        main(void);

int main(void) {

    float amplitude = MAXAMP;

    float amp = 2*MAXAMP;

    float frequency = FREQUENCY;

    float freq = 2*FREQUENCY;

    float phase = 0.;

    unsigned long n; // the current sample number

    unsigned long totalsamples = (unsigned long)(NUM_SECONDS*SAMPLE_RATE);

    float twopiFoverR = TWOPI*frequency/SAMPLE_RATE;

    float w = TWOPI*freq/SAMPLE_RATE;

    float y; // the current sample value

    for( n = 0; n < totalsamples; n++ )

    {

        y = amplitude*sin(twopiFoverR*n+phase) + amp*sin(w*n+phase);

        fprintf(stdout, "%f\n", y);

    }

    return 0;

}

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