code: /*
   * Computoser is a music-composition algorithm and a website to present the results
   * Copyright (C) 2012-2014  Bozhidar Bozhanov
   *
   * Computoser is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   *
   * Computoser is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with Computoser.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package com.music.tools;
  
  import java.lang.reflect.Field;
  import java.util.HashMap;
  import java.util.Map;
  
  import jm.constants.ProgramChanges;
  import jm.music.data.Part;
  import jm.music.data.Score;
  import jm.util.Read;
  
  import org.apache.commons.lang3.StringUtils;
  
  public class InstrumentExtractor {
  
      public static void main(String[] args) {
          Map<Integer, String> instrumentNames = new HashMap<>();
          Field[] fields = ProgramChanges.class.getDeclaredFields();
          try {
              for (Field field : fields) {
                  Integer value = (Integer) field.get(null);
                  if (!instrumentNames.containsKey(value)) {
                      instrumentNames.put(value,
                              StringUtils.capitalize(field.getName().toLowerCase()).replace('_', ' '));
                  }
              }
          } catch (IllegalArgumentException | IllegalAccessException e) {
              throw new IllegalStateException(e);
          }
  
          Score score = new Score();
          Read.midi(score, "C:\\Users\\bozho\\Downloads\\7938.midi");
          for (Part part : score.getPartArray()) {
              System.out.println(part.getChannel() + " : " + part.getInstrument() + ": " + instrumentNames.get(part.getInstrument()));
          }
      }
  }
  