I have a question about my playChord method. I am trying to convert the duration

Question

I have a question about my playChord method. I am trying to convert the duration and an arbitrary number of frequencies into values in a slice array. The frequencies will be an array called frequencies. I am unsure on how to approach this detail. Any hints or suggestions that would be helpful?

Here is my code so far:

import stdlib.StdAudio;

public class PlayChords {

public static void playChord(double duration, double... frequencies){

final double sliceCount = (int) (StdAudio.SAMPLE_RATE * duration);

final double[] slices = new double[(int) (sliceCount + 1)];

for(int i =0; i < sliceCount; i++){

slices[i] = Math.sin(2 * Math.PI * i * frequencies/StdAudio.SAMPLE_RATE);

}

StdAudio.play(slices);

//**My code goes here**

StdAudio.play(slices);

}

thank you very much

Explanation / Answer

There is just a very simple mistake,you line

slices[i] = Math.sin(2 * Math.PI * i * frequencies/StdAudio.SAMPLE_RATE);

will be like

slices[i] = Math.sin((2 * Math.PI * i * frequencies[i])/StdAudio.SAMPLE_RATE);

This is because multiple arguments are assumed as a array.you code then becomes

public class PlayChords {

public static void playChord(double duration, double... frequencies){

final double sliceCount = (int) (StdAudio.SAMPLE_RATE * duration);

final double[] slices = new double[(int) (sliceCount + 1)];

for(int i =0; i < sliceCount; i++){

slices[i] = Math.sin((2 * Math.PI * i * frequencies[i])/StdAudio.SAMPLE_RATE);

}

// you already have a array of frequencies as you're using the multiple arguments syntax

StdAudio.play(slices);

//**My code goes here**

StdAudio.play(slices);

}

}

rest all is fine as far as I think

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