import jm.music.data.*;
import jm.music.tools.*;
import jm.JMC;
import jm.util.*;

/**
 * Play's the opening section of Steve Reich's "Piano Phase" 
 * This deomsytrates playing two parts at different tempi.
 * @author Andrew R. Brown
 */
public final class PianoPhase implements JMC{
	public static void main(String[] args){
		//Create the data objects we want to use
		Score score = new Score("Piano Phase");
		Part p1 = new Part("Piano1", PIANO, 0);
		Part p2 = new Part("Piano2", PIANO, 1);
		Phrase phrase1 = new Phrase(0.0);
		//Lets write the music in a convenient way.
		int[] pitchArray = {E4,FS4,B4,CS5,D5,FS4,E4,CS5,B4,FS4,D5,CS5};
		double[] rhythmArray = {SQ, SQ, SQ, SQ, SQ, SQ, SQ, SQ, SQ, SQ, 
                                                                        SQ, SQ};
		
		//add the notes to the first phrase
		phrase1.addNoteList(pitchArray, rhythmArray);
		// repeat the stable piano part and add it to a part and score
		Mod.repeat(phrase1, 52);
		p1.addPhrase(phrase1);
		score.addPart(p1);
		
		//Make two new phrases and change starttimes to make a round
		Phrase phrase2 = (Phrase) phrase1.copy();
		phrase2.setStartTime(0.0);
		// Phrase 3 is the one which extends phrase two at a different 
                // tempo
		for(int i = 1; i<rhythmArray.length;i++) {
			rhythmArray[i] = rhythmArray[i] * 0.975;
		}
		Phrase phrase3 = new Phrase(0.0);
		phrase3.addNoteList(pitchArray, rhythmArray);
		phrase3.setStartTime(24.0);
		//Phrse four is played after the offset period
		Phrase phrase4 = (Phrase) phrase1.copy();
		phrase4.setStartTime(141.0); 
                //one beat short of the start of bar 13
		
		//Play different parts in different octaves for more audible 
                //clarity
		Mod.transpose(phrase2, 12);
		Mod.transpose(phrase3, 12);
		Mod.transpose(phrase4, 12);
		
		//loop phrases
		Mod.repeat(phrase2, 7); // stable
		Mod.repeat(phrase3, 40); // accellerate
		Mod.repeat(phrase4, 7); //stable again
		
		//add phrases to the two instruments
		p1.addPhrase(phrase1);		
		p2.addPhrase(phrase2);
		p2.addPhrase(phrase3);
		p2.addPhrase(phrase4);
		//add second piano instrument to the score
		score.addPart(p2);	
			
		//OK now we SMF write 
		Write.midi(score, "PianoPhase.mid");
	}
}