object ICloneable.Clone()
{
NoteWithAttackPoint n = (NoteWithAttackPoint)base.Clone();
n.AttackPoint = AttackPoint;
return(n);
}
/// <summary>
/// Returns the likely alphabets for this group, with a score from 0 to 100 representing the probability that each alphabet is correct.
/// Alphabets are chosen based on looking at longer notes on stronger beats.
/// </summary>
/// <returns></returns>
public List <Tuple <Alphabet, float> > GetAlphabetsWithLikelihoods()
{
List <Tuple <Alphabet, float> > results = new List <Tuple <Alphabet, float> >();
int[] attackPointLevels = Measures[0].GetAttackPointLevels();
// Score all possible alphabets.
float totalScore = 0;
foreach (Alphabet a in possibleGroupAlphabets)
{
// set up scoring for each pitch in the alphabet.
Dictionary <int, float> scores = new Dictionary <int, float>(); // (pitch class, score) Scores between 0 and 1.
foreach (ScaleDegree sd in a)
{
scores[Key.GetScaleDegreePitchClass(sd)] = 0;
}
// Tally the 1) duration and 2) beat strength for each pitch in the group, if it's found in the alphabet.
List <NoteWithAttackPoint> notes = AllNotes;
foreach (NoteWithAttackPoint n in notes)
{
int dur = Math.Min(n.duration, 16); // 1-16
int attack = n.AttackPoint;
int level = attackPointLevels[attack]; // stength from 0-4 of beat position.
if (n.midiInfo == null)
{
continue;
}
int pc = n.midiInfo.PitchClass;
if (scores.ContainsKey(pc))
{
scores[pc] += (dur / 16.0f) * Constants.ALPHABET_SCORING_DURATION_WEIGHT + (level / 4.0f) * Constants.ALPHABET_SCORING_LEVEL_WEIGHT;
}
}
// Bonus for ending group in chord (just add additional salience to final note).
if (notes.Count > 0)
{
NoteWithAttackPoint n = notes[notes.Count - 1];
if (n.midiInfo != null)
{
int pc = n.midiInfo.PitchClass;
if (scores.ContainsKey(pc))
{
int dur = Math.Min(n.duration, 16); // 1-16
scores[pc] += (dur / 16.0f) * Constants.ALPHABET_SCORING_FINAL_NOTE_WEIGHT;
}
}
}
// Sum the scores over all notes in the alphabet to get alphabet score.
float score = 0;
foreach (ScaleDegreeWithStability sd in a)
{
// TODO: add in small score for non-stable notes too.
score += sd.Stability * scores[Key.GetScaleDegreePitchClass(sd)];
}
// Bonus for starting piece on tonic chord.
if (this.MinLocation == 0 && a.RootScaleDegree.IsTonic)
{
score *= 5;
}
//score = 100.0f * (score / 7);
results.Add(Tuple.Create(a, score));
totalScore += score;
}
// Normalize results.
List <Tuple <Alphabet, float> > resultsNormalized = new List <Tuple <Alphabet, float> >();
foreach (Tuple <Alphabet, float> x in results)
{
resultsNormalized.Add(Tuple.Create(x.Item1, 100.0f * x.Item2 / totalScore));
}
return(resultsNormalized);
}
