Audio Chorale - Getting synthesis output

 

The final audio file will sound like this:

Click here to view source.

Lets have a closer look. 
import jm.music.data.*;
import jm.JMC;
import jm.audio.*;
import jm.util.*;
As well as the by now familiar imports, note that the jm.audio.synth.* and jmInst imports are necessary for audio.

public final class AudioChorale implements JMC{
	public static void main(String[] args){



 
		//set up instruments and ensemble
		Instrument[] ensemble = new Instrument[4];



 
		for (int i=0; i<4; i++) {
              TriangleInst tri = new TriangleInst(8000);
			ensemble[i] = tri;
        }
At the start of the class we declare the instrument, in this case using the TriangleInst, and we declare an array of all the instruments to be used (in this case one) in a variable called ensemble.

// set up the pitches and durations of each line
		int[] pitchSop = {C5,G4,E4,D4,G4,a4,c4,D4,E4,D4,F4,E4,A4,G4,E4};
		double[] rhythmSop = {Q,Q,DQ,SQ,Q,Q,Q,Q,Q,Q,Q,Q,C,Q,Q};
		int[] pitchAlto = {E4,D4,C4,A3,B3,C4,D4,C4,D4,CS4};
		double[] rhythmAlto = {Q,Q,M,Q,Q,Q,Q,M,Q,Q};
		int[] pitchTenor = {G3,C4,B3,A3,G3,F3,E3,G3,G3,C4,B3,A3,B3,A3};
		double[] rhythmTenor = {C,Q,SQ,SQ,Q,Q,Q,Q,C,Q,Q,C,Q,Q};
		int[] pitchBass = {C3,B2,A2,G2,F2,E2,F2,A2,G2,C3,B2,A2,G2,F2,F3,E3,A3};
		double[] rhythmBass = {Q,Q,Q,SQ,SQ,Q,Q,Q,Q,Q,Q,Q,Q,Q,Q,Q,Q};
		
		//create the jMusic objects
		Phrase soprano = new Phrase();
		Phrase alto = new Phrase();
		Phrase tenor = new Phrase();
		Phrase bass = new Phrase();	



 
 
		// add the notes to each phrase
		soprano.addNoteList(pitchSop, rhythmSop);
		alto.addNoteList(pitchAlto, rhythmAlto);
		tenor.addNoteList(pitchTenor, rhythmTenor);
		bass.addNoteList(pitchBass, rhythmBass);
		
		// create jMusic parts
		Part s = new Part("Soprano", 0);
		Part a = new Part("Alto", 1);
		Part t = new Part("Tenor", 2);
		Part b = new Part("Bass", 3);
		



 
		// add the phrases to the parts
		s.addPhrase(soprano);
		a.addPhrase(alto);
		t.addPhrase(tenor);
		b.addPhrase(bass);
		
		//create a score
		Score score = new Score("Chorale");



 
 
		//add the parts to the score
		score.addPart(s);
		score.addPart(a);
		score.addPart(t);
		score.addPart(b);



 
 
		//display the result for the world to see
		View.show(score);
This is the chorale making code - see the Chorale demo for details.

	// save score as an audio file
		Write.au(score, "AudioChorale.au", ensemble);
	}
}
This is where it all happens. After the score is created it is rendered as an audio file with the writeAU() method. The method is passed the file name and instument array.

jMusic Tutorial Index



© 2000 Andrew Sorensen