/**
* Writes a bass line to the track
*
* @param chord chord, which notes are using to write a bass line
* @param harmony harmony, which notes we use to made a bass line
* @param track track on which we write a bass line
* @throws TWDataException
*/
public static void WriteBassLine(TWChord chord, TWHarmony harmony, TWInstrumentTrack track) {
TWScale HarmonyScale = TWScaleManager.constructHarmonyScale(harmony);
Random rnd = new Random();
// One measure contains only eighth notes
for (int i = 0; i < 8; i++) {
int randNoteFromScale = rnd.nextInt(HarmonyScale.ScaleSize());
int randNoteOnFret = rnd.nextInt(2);
int randNoteInFirstPart = rnd.nextInt(4);
int randPlaceInFirstPart = rnd.nextInt(4);
boolean PlaceInFirstPart = false;
// Bass line divided into two parts. First part contains 6 eighth notes,
// preferably main note from chord.
// Second part contains 2 eighth notes.
if (i == 0 || i == 1 || i == 2 || i == 3 || i == 4 || i == 5) {
// Writes random note in first part. Probability 1/4
if (randNoteInFirstPart == 0) {
// Writes note in random first part place. Probability 1/4
if (i == randPlaceInFirstPart) {
PlaceInFirstPart = true;
BassLineNote(HarmonyScale.getNote(randNoteFromScale), randNoteOnFret, track);
}
}
// Writes main note.
if (!PlaceInFirstPart) BassLineNote(chord.getNote(0), 0, track);
}
// Second part. Writes random note from harmony scale.
if (i == 6 || i == 7)
BassLineNote(HarmonyScale.getNote(randNoteFromScale), randNoteOnFret, track);
}
}
/**
* Writes a simple bass line to the track
*
* @param chord chord, which notes are using to write a bass line
* @param track track on which we write a bass line
* @throws TWDataException
*/
public static void WriteSimpleBassLine(TWChord chord, TWInstrumentTrack track)
throws TWDataException {
TWSimpleNote Note;
int[] frets;
// One measure contains only eighth notes
for (int i = 0; i < 8; i++) {
// Use first, main note from given chord
Note = chord.getNote(0);
frets = track.getFretsByNoteAndString(Note, 4);
// Writes it on fourth string
track.addNoteNew(frets[0], 4, 8);
}
}
/**
* Writes a bass line with pauses to the track
*
* @param chord chord, which notes are using to write a bass line
* @param track track on which we write a bass line
* @throws TWDataException
*/
public static void WritePauseBassLine(TWChord chord, TWInstrumentTrack track)
throws TWDataException {
Random rn = new Random();
TWSimpleNote Note;
int[] frets;
// One measure contains only eighth notes
for (int i = 0; i < 8; i++) {
int randPause = rn.nextInt(3);
// Writes eighth rest. Probability 1/3
if (randPause == 0) track.addRest(8);
else {
// Use first, main note from given chord
Note = chord.getNote(0);
frets = track.getFretsByNoteAndString(Note, 4);
// Writes it on fourth string
track.addNoteNew(frets[0], 4, 8);
}
}
}
