28Jul / 2012

Do Thing

Algorithmic music: A more recent rendition of the Technical Academy classic.

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One response to “Do Thing”

  1. Bobby Lee

    Source code:

    package com.b0b.academy;

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

/**
 * Title: Dothing
 * Description: This is a port of the Technical Academy file "dothing",
 *                 written in Forth, dated 30Dec89
 * Copyright (c) 1989, 2002
 * @author b0b Lee
 */

public class Dothing extends Rand implements JMC
{
  public Dothing()
  {  }

  void wha(int its, Phrase phrase, int volume, int bottom)
  {
    phrase.add(new Note(bottom, WHOLE_NOTE, volume));

    for (int i = 3; i < (its + 3); ++i)
    {
      volume = volume + (get(21) - 10);
      // clamp the volume
      // volume = Math.max(volume, 24);
      // volume = Math.min(volume, 105);

      int third = i / 3;
      int pitch = bottom + ((get(37) / third) * third);
      pitch = Math.min(pitch, 127);
      phrase.add(new Note(pitch, QUARTER_NOTE, volume));
    }

    phrase.add(new Note(bottom, WHOLE_NOTE, volume));
  }

  Phrase do1 = new Phrase(0);
  Phrase do2 = new Phrase(0);
  Phrase do3 = new Phrase(SIXTEENTH_NOTE);
  Phrase do4 = new Phrase(SIXTEENTH_NOTE * 3.0);
  Phrase do5 = new Phrase(EIGHTH_NOTE);
  Phrase do6 = new Phrase(THIRTYSECOND_NOTE * 5.0);

  void thing(int its)
  {
    wha(its, do1, 35, 40);
    wha(its, do2, 80, 33);
    wha(its, do3, 60, 43);
    wha(its, do4, 30, 45);
    wha(its, do5, 70, 34);
    wha(its, do6, 60, 69);
    do6.add(new Note(0, THIRTYSECOND_NOTE, 0));
  }

  public Score getScore()
  {
    Score score = new Score();
    score.setTempo(144.0);

    thing(36);
    thing(72);
    thing(24);
    thing(96);
    thing(1);

    score.add(new Part(do1, "vibes", VIBRAPHONE, 0));
    score.add(new Part(do2, "bass", SLAP_BASS, 1));
    score.add(new Part(do3, "guitar1", SGUITAR, 2));
    score.add(new Part(do4, "guitar2", SGUITAR, 3));
    // don't set instrument on drum channels
    // synths know that channel 10 is for drums
    // note that setChannel is zero-based
    Part drum1 = new Part(do5, "drum1");
    drum1.setChannel(9);
    score.add(drum1);
    Part drum2 = new Part(do6, "drum2");
    drum2.setChannel(9);
    score.add(drum2);

    return score;
  }
}
    Reply ↓

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